Engine Modifications & Upgrades

8mm titanium valve spring retainer disc - high performance



Fits:
Porsche 993 - 1994 to 1998

8mm Porsche 911 Titanium Retainers for 993 1995-1998 for 8mm valves.

Please note
Must be used in conjunction with Aasco HP109-Valve Springs and HPSS Spring Seats. 

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HP10T8

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Air intake manifold 964/993 to GT3, billet aluminium - Set of 6
Comes complete with thermal insulating manifold gaskets



Fits:
Porsche 964 - 1989 to 1993
Porsche 993 - 1994 to 1998

Tailored for GT3 Type Intakes:
Specially designed to fit GT3  intake manifolds (with built-in offsets) perfectly accommodating the narrower 964/993 engines.

Product Overview:
Crafted from top-quality aircraft aluminum, our Porsche 964/993 to GT3 Billet Intake Runners offer optimal performance. 
Available in head diameters of 41.5mm, 42.5mm, 44mm or 45.8mm with standard injector sizes. 

Versatile Compatibility and Configurations:
Compatible with standard rails or engineered for use with the IslandWorks/Nuke system, featuring a direct mount fuel regulator. 

Superior Craftsmanship and Finish:
Each runner boasts a natural machined finish and includes a base gasket insulator, ensuring optimal performance.

Important Note:
To ensure effective heat insulation, this product requires a flat cylinder head seal, offering better performance compared to the usual seal type.
Supplied with reinforced high thermal plastic gaskets for thermal insulation

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96411071101

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Air intake manifold billet aluminium - Set of 6
Comes complete with manifold gaskets



Fits:
Porsche 964 - 1989 to 1993
Porsche 993 - 1994 to 1998

For use with the standard 964/993 inlet manifolds and 3 bolt manifolds

Product Details:
Replace your aging plastic intake runners on the Porsche 964/993 with meticulously 3D milled billet versions in aircraft aluminum, offering durability and aesthetic enhancement.

Enhanced Specifications:
Available in head diameters of 41.5mm or 42.5mm, paired with standard injector sizes. 

Flexible Compatibility and Configurations:
Compatible with standard rails 

Important Note:
To ensure effective heat insulation, this product requires a flat cylinder head seal, offering better performance compared to the usual seal type.
Supplied with reinforced high thermal plastic gaskets for thermal insulation

Craftsmanship and Finish:
Featuring a natural machined finish, these runners are equipped with a base gasket insulator for 

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99311071250

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Billet aluminium crankshaft pulley for single belt conversion.
Diameter: 145mm
Replacement for 99310205001.



Fits:
Porsche 993 1995-98 3.6L

Requires (99310605180/1) single belt conversion hub.

We also recommend our (3609001604) billet fan pulley for full appearance upgrade.

Drive by wire inlet conversion kit
Convert the 964/993 induction to Drive by Wire set-up

Fits:
Porsche 964 - 1989 to 1993
Porsche 993 - 1994 to 1998

Product Overview:
Transform your Porsche 964's performance with this sleek and high-tech intake kit designed for Porsche 964/993. This innovation marks a transition from the typical accelerator cable-based throttle to an electronic "drive by wire" throttle body. This advanced change streamlines the intake system by eliminating unnecessary components, resulting in a cleaner engine bay appearance. 

This modification offers a more drivable setup for highly tuned engines while incorporating the precision of a drive by wire (DBW) throttle.

This enhanced drivability is a key feature for a tuned aircooled engine and allows for smooth idle control with a cold as well as a hot engine. It simply makes the engine feel more modern as compared to the old ITB (individual throttle bodies) setups lacking in mid range torque and difficulties with the idle control.

Precision-Engineered Components:

• 82mm Throttle Body with Reinforced Industrial PA12 Manifold
• CNC-Milled Intake Manifold Stacks Crafted from Billet Aluminium
• Included Rubber Boots and Clamps for Easy Installation
• Islandworks Resonance Tube with Valve and Solenoid, Manufactured from the Same PA12 Material
• Integrated Manifold Pressure and Temperature Sensors
• Essential Vacuum Lines for Optimal Performance

Kit Includes
Complete intake with all the parts seen in the image manufactured from modified PA12 using an industrial process. This intake plenum has been optimized to fit on a Porsche 964 or Porsche 993 and includes all vacuum ports for both brake vacuum and to maneuver the resonance flap.

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96411090100

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Performance engine mounts (PAIR). Included two M12 x 1.75 Nuts



Separate inserts available for varying densities
Shore ratings 65A Street (available separately)
Shore ratings 75A Fast Road (included in engine mounts)
Shore ratings 85A Track (available separately)

Fits:
Porsche 964 C2 / C4 / RS / Turbo
Porsche 993 C2 / C4 / RS / Turbo
Porsche 996 C2, C4, C4S, Turbo, GT2, GT3
Porsche 997 C2, C2s, C4, C4s, Turbo, GT2, GT3

Please note: the threads needs to be treated with loctite before installation (not sold with the product).

Replacing your factory engine mounts with these performance semi-solid mounts will dramatically decrease engine movement which then will result in better acceleration and handling of your Porsche.

CNC machined mounts with PU bushes are absolute must have for any car on track or on the street. Very easy to replace by experienced DIYers.

For 911 & Porsche world article / fitment guide pdf please CLICK HERE

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3609309625

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Tuneable Semi-Solid Engine Mount.
SET OF 2 Includes three pairs of inserts in varying densities

 

Fits:
Porsche 964/993/996/997

The Rennline Tune-able Engine Mount for the 964, 993, 996, and 997 offers the ultimate in adjust ability for your car. Replacing your compliant factory mounts will decrease engine movement resulting in better acceleration, handling and significantly increased shifter feel. This is the ultimate solution for almost any car, and allows you to tune our mounts for the way you drive. Our mounts are CNC machined from billet aluminium and include three pairs of inserts in varying densities. Tune your mounts by using the softer inserts to reduce engine slop and avoid missed shifts in your street car, or utilise the stiffest inserts to get the most from a more focused track car. You can even mix and match, giving you 9 possible combinations to let you dial in our mount to your specifications. Here at Rennline we know you want your Porsche to be flawless, and that is why we are Driven to Improve Excellence.

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M18

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Rennline Solid Motor / Engine Mounts Pair. ALUMINIUM.
SET OF 2



Fits:
Porsche 964
Porsche 993
Porsche 996
Porsche 997

Solid engine mounts are a smart upgrade to any track or aggressive street car, and were installed on Porsche factory race cars. Stock mounts are made of compliant rubber, and contribute to imprecise shifting and inferior throttle response. Solid mounts create slightly more interior vibration than rubber mounts, but securely connect the engine and transmission assembly to the car's unibody, creating a crisper throttle response and shifter feel. Rennline's solid mounts are CNC machined from 6061 aluminum for strength and light weight, and come as a pair with new Grade 8 mounting hardware. Sold as a set of (2)

Motorsport Product

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M08

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Billet aluminium black fan pulley half for single belt hub conversions. 



Fits:
Porsche 964 1989-94
Porsche 993 1995-98

Replacement for Porsche OE numbers 96410651102, 93010650900, 93010651000,

The single fan belt aluminum pulley is a compact and lightweight component designed to efficiently transfer power from the engine to the cooling fan. Its sleek aluminum construction ensures durability while reducing overall weight, allowing for improved engine performance and enhanced fuel efficiency. With its streamlined design, this pulley delivers reliable and smooth operation, contributing to the optimal functioning of the cooling system.

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3609001604

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Billet aluminium black fan pulley half.

Replacement for 96410651102, 93010650900, 93010651000,



Fits:
Porsche 964 1989-94
Porsche 993 1995-98

CNC machined from 7075 aircraft alloy and hard anodized for wear. These pulleys are half the weight of the factory part, spin true and make an awesome appearance upgrade.

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RS-164B

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Oil backflow prevention kit, engine side. 

Fits                                                                                                                                                                                                                                                                                        Porsche 993 Carrera 2 / 4                                                                                                                                                                                                                                      Porsche 993 S / C4S                                                                                                                                                                                                                                               Porsche 993 turbo                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               This oil backflow kit incorporates a check valve between the oil tank and the engine which prevents the smoking on start up for naturally aspirated and turbocharged 993 models.

Perhaps you have installed a pressure side oil backflow kit on your turbo model but are still experiencing smoking on start up. The issue may be on the suction side. The problem on the suction side is due to the oil tank sitting higher than the engine oil pump. Gravity creates a positive pressure on the pump and slowly fills the engine case with time. The case fills up and eventually pushes oil into the catch tanks on the hot side / turbine side of the turbo charger. Once the car is started, the cars smokes very heavily which is often misdiagnosed as a defective turbocharger.

Sold individually. 1 necessary per car.

Recommendation: This kit is all that is necessary for naturally aspirated models. 

It is best to address both the suction and pressure side to prevent the issue entirely on turbo charged models. We also sell a pressure side backflow kit under part # 993113320

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993113320

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Oil backflow prevention kit, turbocharger side. 

Fits                                                                                                                                                                                                                                                                                        Porsche 993 turbo   

Are you experiencing smoking on start up after your turbo sits for extended periods of time? Odds are you are experiencing what is commonly referred to as oil back flow.

The problem arises from the use of low viscosity oil and the upgraded oil filter cut off mechanism not working as it should. So, you get a slow stream of engine oil which leads to overflow of the oil catch tanks on the turbochargers (pressure side).

If your leaking is due to this reason, our FVD pressure side oil backflow kit incorporates check valves that will prevent the oil from overflowing in the catch tanks and will ultimately stop the smoking on start up.

Kit Includes:                                                                                                                                                                                                                                                                      Oil Lines, Check Valves, Adapters, Washers, and hardware

Sold as a kit. 1 necessary per car.

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            

Oil inlet check valve. fits to oil pipe 99320725300



Fits:
Porsche 993 / 993TT 1995-98

Oil Inlet Check Valves eliminate oil migration from the oil tank to the engine reducing excessive smoking on start up typical of cars that sit for long periods of time.

For freshly rebuilt engines, do not install check valve until first oil change.
Before installing, start your engine and verify/ reference your oil pressure. Drain oil from the engine and oil tank. Remove the rubber oil inlet hose on the right side of the engine directly behind the #6 cylinder. Cut a 1.5" piece out of the center of the horizontal section of the hose. Install the check valve with the correct orientation and tighten the clamps. Reinstall the hose and refill engine oil.
Check your oil pressure gauge when you start your engine and verify pressure.
Note: the valve is clearly marked with an engine side and a tank side. Failure to install the check valve in the right orientation will cause oil starvation and catastrophic damage to your engine.

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RS-29B

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Rennline Engine Carrier Reinforcement Gusset Kit.



Fits:
Porsche 964 1989-94
Porsche 993 1995-98 All Except -92 Turbos

One of the only weak points on the 964 and 993 chassis is the engine carrier. When these models are tracked, or are fitted with stiffer than stock engine mounts, the engine carrier should be reinforced. If it is not, the carrier is known to bend, crack, or even break cleanly away from an engine mount in response to increased vibration and stress. The Porsche factory was aware of this problem and equipped its race cars with a reinforced engine carrier. Rennline now exclusively offers an engine mount reinforcement gusset kit that can be welded to the engine carrier by your workshop.

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M04

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Rennline Tubular Engine Carrier.



Fits:
Porsche 964
Porsche 993

One of the only weak points on the 964 and 993 chassis is the engine carrier. When these models are tracked, or are fitted with stiffer than stock engine mounts, the engine carrier is known to bend, crack, or even break cleanly away from an engine mount in response to increased vibration and stress. The Porsche factory was aware of this problem and equipped its race cars with a reinforced engine carrier. Rennline now offers a tube frame replacement for your factory engine carrier that is proven to be much stronger, and can withhold the stresses of any track day, while offering a 1.4lb weight savings over a gusseted factory carrier. All parts manufactured on cnc equipment and meticulously tig welded, finished with a matte black powdercoat.

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M19

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Billet aluminium RS conversion fan hub.
Replacement for 96410605130, 96410605131, 99310605180.
Converts standard two belt system to single belt as used on factory RS models. Necessary fasteners are included.



Fits:
Porsche 964 1989-94
Porsche 993 1995-98

CNC machined from 6061 aircraft alloy and anodized gloss black.

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99310605180

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Rennline Billet Aluminium Valve Cover LOWER.
SET OF 2



Fits:
Porsche 993 TURBO 1995-98

Tired of oil puddles in the driveway? Rennline has the solution with our new billet, fully CNC machined valve covers. These valve covers are a direct bolt on replacement for your flimsy leaking factory covers, and are machined to accept the reusable OEM gaskets (available separately). With the corrosion resistant finish, chamfered edges, and tight gasket fitment, these valve covers are simply the best on the market. Available in Anodized clear or black finishes, or powdercoat red all with or without the fins brushed. Also included are the spark plug wire retainers and retainer hardware for a clean installation.

Note: Red are coated to order, please allow 1 week for red coating.

Note: Pictures may not show actual product.

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M15

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Rennline Billet Aluminium Valve Cover replaces OE 99310511505 UPPER.
SET OF 2



Fits:
Porsche 993 1995-98
Porsche 993 Turbo

Tired of oil puddles in the driveway? Rennline has the solution with our new billet, fully CNC machined valve covers. These valve covers are a direct bolt on replacement for your flimsy leaking factory covers, and are machined to accept the reusable OEM gaskets (available separately). With the corrosion resistant finish, chamfered edges, and tight gasket fitment, these valve covers are simply the best on the market. Available in Anodized clear or black finishes, or powdercoat red all with or without the fins brushed. Also included are the spark plug wire retainers and retainer hardware for a clean installation.

Note: Pictures may not show actual product.

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M13

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Valve spring kit - high performance. 



Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998

Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a spring from another use. 

It operates a higher natural frequency than the original spring for racing and at the very least minimizes damage from over rev in track day situations. 

Please note
993 - must use 8mm Ti retainers and Aasco Seats

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HP109

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Valve spring seat kit - high performance. 



Fits:
Porsche 911 - 1965 to 1989
Porsche 964 - 1989 to 1994
Porsche 993 - 1994 to 1998

Our Steel Spring Seats pocket the inner spring of our Aasco High Performance Valve Springs.

Our Valve Springs are designed and manufactured to specifically fit the envelope of a Porsche application not a spring from another use. 

It operates a higher natural frequency than the original spring for racing and at the very least minimizes damage from over rev in track day situations. 

Please note
993 - must use 8mm Ti retainers and Aasco Seats

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HPSS

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