Front shock absorber bump stop. Porsche 981 / 991 / 982  ❭  99134330105

Front shock absorber bump stop
This Porsche Genuine OE Front Shock Absorber Bump Stop is an original factory front suspension buffer / jounce bumper designed for Porsche 981 Boxster & Cayman, 991 Carrera, and 982 (718) models. Mounted on the front shock absorber shaft, this component acts as a protective cushion at the limit of suspension compression travel.
Sold individually, 2 required -  fits left or right suspension strut

Fits:
Porsche 981 Boxster 2012-16 cars with Sport Chassis / without PASM
Porsche 981C Cayman 2014-16 cars with Sport Chassis / without PASM
Porsche 981 Spyder 2016 

Porsche 982 Boxster 2017-21 cars with Sport Chassis (M030)
Porsche 982C Cayman 2017-21 cars with Sport Chassis (M030)

Porsche 991.1 Carrera / Turbo 2012-16 cars with Sport chassis or PASM (M030 / M031)
Porsche 991.2 Carrera / Turbo 2017-19 cars with Sport chassis or PASM (M030 / M031)

Diagram ref no 6


The bump stop compresses when the suspension approaches full travel, preventing harsh metal-to-metal contact within the shock absorber assembly.

It absorbs impact forces generated during:
• Heavy braking
• Road impacts and potholes
• Aggressive cornering
• High-load suspension compression

This helps protect the shock absorber, top mount, spring seat, and chassis from excessive stress while maintaining vehicle stability and ride quality.

Functions & Technical Role
•   Suspension protection: Prevents shock absorber bottoming-out
•   Impact absorption: Cushions heavy suspension compression
•   Ride quality support: Reduces harsh impacts and vibration transfer
•   Component longevity: Protects dampers, mounts, and springs from damage
•   OEM precision: Engineered to Porsche suspension specifications for correct compression characteristics

The bump stop also works as a secondary progressive spring during extreme suspension movement, helping maintain chassis composure and handling balance.

The bump stop protects the suspension system from harsh bottoming-out during heavy compression. It helps preserve ride quality, reduces stress on the shock absorber assembly, and maintains proper handling characteristics.

When to replace
•  Suspension bottoming-out or harsh impacts
•  Cracked, split, or deteriorated foam/rubber
•  Knocking noises from the suspension
•  During shock absorber or suspension overhaul
•  Reduced ride comfort or suspension control

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99134330105

The product you are viewing cross references to these numbers