helper spring Genuine Porsche part 99333310500

Code: 99333310500

Genuine Porsche part

helper spring

The product code 99333310500 was also found on these diagrams

502-00 - additional spring

shock absorber and coil spring 993 1994-98

Additional information:

• 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.

Related products

Shock absorber bump stops and dust covers. Porsche 993

99333310500/2

Product Information

Shock absorber bump stops and dust covers. REAR
This OE match kit consists of a suspension bump stop and dust cover designed to replicate the original Porsche factory components used on the 993 generation 911. Installed on the shock absorber shaft, these components work together to protect and extend the life of the suspension system.
SET OF 4 PARTS

Fits:
rear

Porsche 993 1994 - 1998 (not RS)

Diagram ref no 2 and 3

The bump stop acts as a secondary spring, preventing the shock absorber from fully compressing under extreme loads, while the dust cover shields the piston rod from dirt, debris, and moisture. This combination ensures optimal suspension performance and longevity.

Manufactured to OE specifications, this kit is ideal for replacing worn or deteriorated original parts, especially during suspension overhauls or shock absorber replacement.

This kit protects the shock absorber from impact damage and contamination. The bump stop absorbs excessive compression forces, while the dust cover prevents dirt and debris from damaging the shock shaft, helping maintain smooth suspension operation.

Function
• Absorbs impact at full suspension compression (bump stop)
• Prevents shock absorber bottoming out under load
• Protects shock shaft from dirt, debris, and moisture (dust cover)
• Extends the lifespan of shock absorbers
• Maintains consistent suspension performance and ride quality

Over time, bump stops degrade, crumble, or lose elasticity, while dust covers can crack or split. This exposes the shock absorber to contamination and increases the risk of internal damage. Replacing these components helps protect the suspension system, maintain ride quality, and prevent premature shock failure.

When to replace
• Bump stop is cracked, brittle, or disintegrating
• Dust cover is split, missing, or damaged
• During shock absorber replacement
• Noticeable harsh bottoming-out or knocking noises
• Visible contamination on the shock shaft

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Related, superseded, cross reference or alternative numbers for comparison.

99333310500

99333310500

99333310701

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helper spring Genuine Porsche part 99333310500