The Engine Guardian Water Pump Drive System (EGDS)

EGDS was developed for the Porsche 928 32 valve engine because of the need to prevent catastrophic engine damage in the event of a water pump failure. The water pump is driven by the timing belt which also drives the camshafts. If the water pump shaft seized or became difficult to turn this would cause the timing belt to fail and in return cause internal damage to the valve train by way of piston to valve contact. (read more)

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928 Accessories made in the US for 928 Enthusiasts by 928 Enthusiasts!

"S" Big Brake Adapter Bracket Kit

A true bolt on kit for your Porsche 928 S model, install BIG front brakes without changing any suspension components! Kit includes two precison machined brackets of high strength carbon steel that bolt directly to the existing mounting tabs on your S model. Your order will also include the necessary rotor centering rings, made from aircraft grade aluminum. Supply your own GTS or S4 front calipers (you must modify the S4 calipers to clear larger rotors) and Cayenne front rotors for a complete 330mm (13 inch) front brake setup. Instructions, centering rings and caliper mounting bolts inluded. You must supply the calipers and hoses, brake pads, rotors and bracket to spindle hardware.

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Front Splitter for 83-86S models

These were designed for the Porsche 928S. Adds style and performance to any 928S with factory spoiler already installed. Precision laser cut and CNC bent .125" aluminum parts for consistent form and fit. Kit comes complete with all brackets, stainless steel hardware for corrosion resistance and instructions for a truly bolt on installation


Designed to bolt into existing mount points on the car and is compatible with factory under tray and plastic spoiler. Bracket system helps hold together repaired and glued original spoilers. No weight or load is applied to the original spoiler. Helps force air into radiator opening for better cooling and adds front end down force at speed. Splitter kit comes in raw unfinished aluminum.

Splitter Kit for 928S is $250.00 including shipping via UPS within the continental US.

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Front Splitter for 87 on up S4 models

Under development

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Short Shifters- Real Steel !

5 speed performance short throw shifter for Porsche 928. Shifter length of handle has been shortened and the shift rod mount geometry increased to minimize the distance between gears when shifting. The feel is positive and firm unlike aluminum shifters offered in the aftermarket. Laser cut and precision TIG welded steel assembly to assure accuracy and consistency in manufacture. They are designed to be used with factory shift rod bushings.

Please specify model year when ordering. 

Steel Short Shifter for 928 is $50.00 including shipping via UPS within the continental US.

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                 AC Repair Brackets       

These were developed to re-mount the A/C compressor on 928 engine that was missing the bolt bosses or tabs that snapped off the block. If you don't have access to a good welder to repair the engine block these are another option and an easier route that provide an even stronger mount than original and can get you back on the road quickly.

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Steering Rack Lock Tool  

A "must have" tool if you are a Porsche 928 owner or you work on them. This tool positively locks the rack and pinion steering shaft in center anytime you are changing front end parts and need to have a known reference during re-assembly or adjusting toe in/toe out at alignment time. Made from CNC machined billet aluminum and made to bottom on the housing and prevent applying excess pressure to rack shaft. Will not damage hard parts if left in by accident.

Steering rack tool for 928 is $20.00 including shipping via UPS within the continental US.

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Additional Items Here ....

Supercharger Oil Fill Block-off Plate

This Laser cut aluminum plate is used to block off the factory oil filler location on Porsche 928 engines that have modified breather systems and/or superchargers. This part is heavy gage brushed aluminum to resist warping or distortion. You may drill or tap the flat surface for your application. The o-ring groove is precision cut and includes the sealing o-ring. Mounting hardware is NOT included.

The Block-off plate for 928 is $55.00 including shipping via UPS within the continental US.

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Perfex Manufacturing - 30 Commerce Drive, P.O. Box 1217, Danbury CT 06810

Phone: 203.739.0930 - Fax: 203.739.0949 - Email: