Ford C4 Billet Steel Forward Clutch Drum They produce a simulated trigger

They produce a simulated trigger signal that fires the ignition just as if the engine were running

and a good filter is one of them

Although the GM heads are good pieces

Whether you're rebuilding a stock engine or changing to valve springs that have more seat pressure

Paper Air Cleaners & Kits also available

Ford C4 Billet Steel Forward Clutch Drum They produce a simulated triggerThis C4 Forward Drum is precision machined from 4140 HTSR billet steel providing superior strength and durability. The drum comes with one . 095 thick steel plate for clearance adjustment and, one pressure plate. Made for drag racing and off road applications.