do not press the back button…
Enter your VAT number here and click Verify:
Your details have been verified. VAT number registered to:
,
.
Your order will now be zero rated for VAT purposes. We reserve the right to verify these details after your order request has been made and reinstate VAT if required.
Your VAT details were not recognised or were invalid. Your VAT number must be matched to your Billing Country as specified above. This is currently specified as . You do not need to enter the country code part of your VAT number as this has already been selected in your billing address details above.
The VAT number checking service is currently offline. Please supply your VAT details within the comments or special instructions field below and we will apply a VAT discount after placing your order request.
Original Porsche Part Genuine Porsche part 99312301451
• This part is brand new and unused.
• Please verify that it is 100% suitable for your specific vehicle before purchase to ensure compatibility.
Before purchasing thoroughly check part to confirm compatibility.
- We are unable to provide fitting details for this product at this time. Please contact us for further information.
BorgWarner ref no 53169886736 / 53169886735.
Fits:
Porsche 993 Turbo
REPLACEMENT
These turbos are a direct installation in replacement of your factory turbos.
Click 'Zoom in' for large parts diagram.
Diagram ref no 1 (LEFT) or 2 (RIGHT)
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99312301
The product you are viewing cross references to these numbers
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
BorgWarner ref no 53249887003 / 53249887004.
Fits:
Porsche 993 GT2
REPLACEMENT
These turbos are a direct installation in replacement of your factory turbos.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99312301
The product you are viewing cross references to these numbers
- Porsche 993 (911) GT2 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
The DesignTek Stage 1 turbocharger upgrade service converts customer-supplied Porsche 993 911 GT2 turbochargers to MD422 & MD423 hybrid specification. No complete replacement turbochargers are included.
How the Service Works
Submit your existing turbochargers for modification. Alternatively, obtain new units independently and arrange their conversion as a separate service; purchasing turbochargers does not include upgrade work.
Fits
- Porsche 993 911 GT2 — application specified for this upgrade service.
- 993 (911) (1994–1998)
- 993 (911) TURBO 1994–96
- 993 (911) TURBO S 1994–97
- Porsche 911 Turbo (993) originally fitted with 5316-970-6736 and 5316-970-6735 turbos.
- Porsche 911 Turbo, engine code M64/60, year &, OEM number 99312301452
Turbo and Turbo S entries describe retained applications, not universal donor-unit suitability for this GT2 conversion. Confirm compatibility of both submitted turbochargers. The M64/60 entry provides no valid application year.
Diagram: 202-16, item 1
What This Product Does
This is a modification service applied to turbochargers supplied by the customer. The specified conversion is MD422 & MD423; it is neither an outright turbocharger pair nor an engine overhaul kit.
Functions
- Converts submitted turbochargers to Stage 1 hybrid specification.
- Accepts existing units or independently purchased new turbochargers, subject to compatibility checks.
Technical Details
- Service specification: Stage 1 hybrid conversion, MD422 & MD423.
- Historical designations MD435 & MD436 are retained for identification only and do not specify this conversion.
- Recorded turbocharger references: 5316-970-6736, 5316-970-6735 and 5316-988-6736.
- Recorded engine code: M64/60.
- Internal assembly information identifies turbocharger 99312301452, note /R.
- Historical output designation: 550-600 bhp. No verified output is established for this GT2 service.
These Hybrid Turbos must be fitted as a pair.
* Please Note: Our hybrid turbochargers require exact engine management settings and/or supporting modifications to achieve these horsepower figures.
The retained horsepower note does not establish an output guarantee for this conversion.
Symptoms of Fault
Investigate unusual whining, exhaust smoke, increased oil consumption, delayed boost delivery or oil leakage before submitting units. These symptoms alone do not establish that turbocharger modification is appropriate.
Why Replacement Matters
An upgrade cannot correct an unresolved mechanical defect. Assess engine condition, oil supply, boost pipework and seals first, and review the engine-management requirements alongside any supporting modifications.
FAQs
Are complete turbochargers included?
No. You supply the units that undergo conversion.
Can newly purchased units be submitted?
Yes, subject to compatibility. Obtain them independently and arrange modification separately.
Which specification is requested?
MD422 & MD423. The historical MD435 & MD436 designations do not define this service.
Before ordering, confirm suitability against your vehicle's model, production year and engine specification.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
MD422MD423
The product you are viewing cross references to these numbers
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
DesignTek Stage 2 twin turbo upgrade service for the Porsche 993 911 GT2, using the MD427 & MD428 hybrid specification. This is modification work on turbochargers you supply, not an outright pair of replacement turbos.
How the Service Works
Send your existing turbochargers for upgrading. Alternatively, purchase new turbochargers separately and arrange for those units to undergo the modification service.
Buying new turbochargers does not include the upgrade work. The turbocharger purchase and modification service must be arranged separately.
Fits
- Porsche 993 911 GT2
The following fitment details are retained from the supplied record. Confirm their applicability to this GT2 modification service before arranging work.
- 993 (911) (1994–1998)
- 993 (911) TURBO 1994–96
- 993 (911) TURBO S 1994–97
- Porsche 911 Turbo (993) originally fitted with 5316-970-6736 and 5316-970-6735 turbos.
- Porsche 911 Turbo, engine code M64/60, year &, OEM number 99312301352
Check fitment for your specific vehicle (model, year, engine) before ordering.
Diagram: 202-16
What This Product Does
The service modifies the supplied twin turbochargers to the specified MD435 & MD436 Stage 1 hybrid configuration. It does not supply the donor turbochargers needed for the work.
Technical Details
- Brand: DesignTek.
- Service specification: Stage 1, MD435 & MD436.
- Intended application: Porsche 993 911 GT2.
- Supplied-record turbocharger references: 5316-970-6736, 5316-970-6735 and 5316-988-6736.
- Supplied-record OE reference: 99312301352.
Installation Considerations
The hybrid units require installation as a pair. Engine-management settings and any supporting modifications must be appropriate to the complete engine specification; this service should not be treated as a remedy for an undiagnosed mechanical fault.
FAQs
Does this include two turbochargers?
No. You provide the units that will be modified.
Can newly purchased turbochargers be used?
Yes. Purchase the donor units separately, then arrange their upgrade work as a separate service.
Is modification included when buying new units?
No. Purchasing turbochargers alone does not include this Stage 1 upgrade service.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
MD427MD428
The product you are viewing cross references to these numbers
- Porsche 993 (911) TURBO 1994-96
- Porsche 993 (911) TURBO S 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
DesignTek’s Stage 1 twin turbo upgrade service converts customer-supplied Porsche 993 911 GT2 turbochargers to MD435 & MD436 hybrid specifications. Complete turbochargers are not included.
How the Service Works
Provide your current turbocharger pair for the upgrade work. Alternatively, obtain new turbochargers separately and arrange their modification independently; buying those units does not include this service.
Fits
- Platform reference: 993 (911) (1994–1998)
- Model reference: 993 (911) GT2 1994–97
- Porsche 911 (993) GT2, engine code 993USTGTR2, year 1995-1999, OEM number 99312301382
The platform dates, model dates and detailed turbo application differ. Verify the vehicle identification and fitted turbocharger references before commissioning modification. Check fitment for your specific vehicle (model, year, engine) before ordering.
What This Product Does
This is modification work on a supplied pair, rather than an outright turbocharger purchase. The Stage 1 specification involves changes to compressor wheels, matching housing profiles, turbine wheels and sealing components.
Functions
- Applies MD435 & MD436 hybrid specifications to the supplied units.
- Adapts compressor covers for the revised wheel profiles.
- Modifies both turbochargers for paired installation.
Technical Details
- Stage 1 hybrid references: MD435 & MD436.
- Modified high-flow compressor wheels and correspondingly reprofiled compressor covers.
- Modified, lightened exhaust turbine wheels.
- Motorsport-specification blueprinting and twin piston-ring sealing.
- Replacement references listed: 5316-970-6736 & 5316-970-6735.
- Listed engine-output estimate: 600-650 bhp, subject to supporting modifications and suitable engine-management calibration.
These Hybrid Turbos must be fitted as a pair.
The output estimate is not a promise of results from modification alone. The complete engine configuration and its calibration determine the outcome.
Symptoms of Fault
Investigate blue exhaust smoke, unusual whining, rising oil consumption, slow boost build-up or erratic boost delivery before proceeding. Similar behaviour can arise from leaking hoses, restricted lubrication or boost-control faults, so symptoms alone do not establish turbocharger failure.
Why Replacement Matters
An upgrade is not a remedy for an unresolved mechanical problem. Have the existing units assessed and inspect their oil supply, return lines, intake connections and control hardware. Any underlying fault should be corrected, with calibration matched to the finished engine specification.
FAQs
- Does the service provide a new turbocharger pair?
No. The work is carried out on units you provide, whether existing or separately purchased. - Is modification included when buying new turbochargers?
No. New-unit purchase and upgrade work are separate arrangements. - Is the stated output assured?
No. The 600-650 bhp figure is an estimate dependent on the engine configuration, supporting hardware and calibration.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
MD435MD436
The product you are viewing cross references to these numbers
- Porsche 993 (911) GT2 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
![Porsche 911 (993) GT2 Twin Turbos - Stage 2 - MD547 & MD548 [650-700 bhp] - 99312301385, 5316-988-6736, 5324-970-7003, 5324-988-7003 - MD547, MD548](/uploads/products/e7242f50-6384-422e-9110-677836303c25/Hybrid_Turbo_SM.jpg?width=197&height=148&quality=65&format=webp "Porsche 911 (993) GT2 Twin Turbos - Stage 2 - MD547 & MD548 [650-700 bhp] - 99312301385, 5316-988-6736, 5324-970-7003, 5324-988-7003 - MD547, MD548")
MD547 & MD548 Stage 2 Twin Hybrid Turbos feature:
• Specially modified Garrett 56 trim compressor wheels fitted
• Compressor cover re-profiled to suit replacement compressor wheels
• Exhaust wheels lightened and modified to help reduce backpressure
• Turbochargers fully blueprinted including twin piston ring seals fitted
• Estimated Power Output: 650-700bhp*
MD547 & MD548 Twin Hybrid Turbochargers fit:
Porsche 911 GT2, engine code M64/60 S, year 1995 & 1999, OEM number 99312301385
MD547 & MD548 turbos are a direct replacement for Porsche 911 Turbo, engine code M64/60, year 1995 & 1998, part number 5316-988-6736, OEM number 99312301352 as a performace upgrade.
MD547 & MD548 Hybrid turbos are a direct replacement for 5324-970-7003 & 5324-988-7003 turbo.
These Hybrid Turbos must be fitted as a pair.
*Please Note: Our hybrid turbochargers require exact engine management settings and/or supporting modifications to achieve these horsepower figures.
All Turbochargers are built to order and are usually despatched in 7 working days.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
MD547MD548
The product you are viewing cross references to these numbers
- Porsche 993 (911) GT2 1994-97
Shop Securely
12 Month Warranty
Worldwide Delivery
Monday-Friday: 8.30am - 5.30pm (GMT)
Saturday: Closed
Sunday: Closed