Timing; Under-Drive Pulleys; Oil Cooler; High Horsepower Transmissions - Factory Five Racing Mk4 Roadster Assembly Manual

4.6L 4 valve FRPP Headers.

Timing

Most computer chips simply change the timing of the engine and slightly enrich the mixture. Using a
timing light, advancing the base timing to 14° will do the same. Higher octane fuel will be needed.

Under-drive Pulleys

Yes. They work well on all cars.

Oil Cooler

Not really necessary on small blocks or cars that aren't raced heavily. They look nice when installed in
the smaller opening below the radiator. For supercharged/turbocharged or big block track cars an oil
cooler will help.
Factory Five offers an oil cooler with #10 Stainless Steel braided lines and mounting bracket.

High Horsepower Transmissions

The stock T-5 is good for the stock 302 engine. If the engine is going to have some work done to it then
an upgrade to a heavy duty, Ford Racing "Z" T-5 is all that is needed. An additional change to a Tremec
TKO 500 or 600 is needed if the engine that will be used has 300lbft of torque or more. One unique
feature of the Tremec TKO is it allows the shifter to be relocated 8" forward of the normal shifter
location if a vertical shifter is desired verses a forward angled shifter.

Steering Rack

The complete kit comes with an 18:1 manual steering rack. This is good for most driving situations.
We have found that many of the Challenge Car racers prefer to use power steering. This can be done by
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