5 affordable modifications for Porsche 924S/944

These five modifications each cost less than €200, fit with standard tools, and improve responsiveness, precision or reliability on the 924S and 944. We have fitted them on our own cars; these are the ones we recommend.

Short-throw throttle cam

At small pedal inputs the stock throttle feels soft and indirect, especially when you are driving the car hard. That comes from the shape of the throttle cam, which is progressive and therefore slow to open at low travel.

A short-throw throttle cam changes the relationship between pedal angle and throttle-plate angle, swapping the progressive curve for a linear one. Throttle response in the low-to-mid range becomes sharper. We explain the geometry in why the stock pedal feels soft and how the cam addresses it.

Available in our shop Short-throw throttle cam for Porsche 924S 944 €45

Performance air filter

The stock paper element is built for longevity and noise, not maximum airflow.

A performance oiled-cotton filter flows more freely, which is most noticeable at higher revs. Unlike the original, it can be cleaned and reused.

Recommended product Performance air filter for Porsche 924S 944 €89 ultraperformance.fr

Solid-state DME relay

Hot-start trouble and unexplained cut-outs on these cars are often the DME relay.

The original unit uses mechanical contacts that wear with time and heat. After 30-plus years those contacts become intermittent. A solid-state relay replaces them with electronics that have no moving parts, so current either flows or it does not. Among cheap reliability work, this is usually the first change worth making.

If the hard starting persists after a new relay, the next suspects are the two bell-housing sensors: our guide to testing and replacing the speed and reference sensors walks through the checks.

Recommended product Solid-state DME relay for Porsche 924S 944 €85 ftech9.com

Short shifter

The factory shift action is adequate for the period. Lever travel can feel long when you want quicker, more precise changes.

A short shifter reduces throw by roughly 30 to 40%. Shifts are quicker and more direct. Installation takes more work than the other modifications on this list: you need to get under the console to reach the mechanism. A jack and a clear procedure are enough.

Recommended product Short shifter for Porsche 924S 944 €90 only944.com

Front strut brace

In hard cornering the body flexes slightly. That is expected: the front strut towers are only connected by the bonnet and the surrounding sheet metal.

A strut brace links the two towers with a rigid bar so they cannot spread under load, which stiffens the front axle. For street driving it is not essential. On track, turn-in is more precise and the steering is more consistent under load.

Recommended product Front strut brace for Porsche 924S 944 €268 design911.com

Also from our shop

Beyond the five modifications above, we also make parts we fit on our own 924S and 944 cars. Two that pair well with a reliability refresh:

Available in our shop Stainless exhaust manifold for Porsche 924S & 944 Shop now

Available in our shop Lightweight alternator pulley for Porsche 924S & 944 Shop now

For a deeper look at manifolds and silencers, see our 924S / 944 exhaust buyer’s guide.

Where to start?

All five together stay under €500. If you pick one, start with the solid-state DME relay: it is the simplest, the least expensive, and it addresses a real reliability fault.

The short-throw throttle cam is available in the shop. For fitment questions, contact us.