When overhead cam cylinder heads and engine blocks are machined to flatten their head gasket surfaces the cams are moved closer to the crankshaft and consequently the cam timing relative to the crankshaft is changed. In addition, if the engine is a V-type (like the Z32's VG30DE is), the cam timing will change differently for each side of the engine.

This cam timing change usually necessitates degreeing the cams with an adjustable pulley to get the critical cam opening/closing events back in sync with the crankshaft. If the cams are degreed using the adjustable pulleys that have been available until now, the numbers on their scales would have no relevance whatsoever to their original zero marks when finished. To add to the confusion, a V-engine's different side to side change typically leaves the final degreed setting of each pulley on a different number of their scales... that is "if" they ever came with a zero mark reference.

Enter the BDE Bullseye Adjustable Exhaust Pulley - After the cams are degreed to the crankshaft, the unique BDE outer ring adds a third timing element which can be rotated to align with the scale's zero mark so future adjustments can easily be made without the hassle of remembering where the original degreed setting was. Now the vernier scale actually means something after the cam degreeing process. For fresh builds, the pulleys can easily be set to true zero by visually centering the bullseye and then setting the scale's zero to the ring's timing mark.

Optional Stainless Steel Cam Bolts

Stock VG exhaust pulley cam bolts are typically rusty and hideous looking and if you want to show off your BDE camshaft drive pulleys, the stock bolts never seem to live up to the task. The VG's exhaust pulley bolts are an odd 7mm OD x 1.0mm pitch and any 7mm bolt is a close relative to unicorns - forget about stainless steel versions.

BDE has made 17-4 stainless steel 7mm x 1.0mm bolts, heat-treated to H900 for 180ksi tensile strength, and polished to full luster. Sold in packs of 4 bolts and washers to allow you to decorate one pulley or both (right side is more visible than the left side pulley since it's hidden under the CAS mount). Available in 25mm UHL to work with the right side cam and stock Early Mitsubishi CAS left side (late Hitachi CAS clearance is very tight and it may need to be machined for clearance), and 30mm UHL to work with the BDE cam sync hub used with crank trigger applications.

PN: BDE-630, 25mm UHL, quantity 4 bolts, right side or stock Early Mitsubishi CAS left side. Price - $55.00

PN: BDE-631, 30mm UHL, quantity 4 bolts for crank trigger with cam sync only. Price - $55.00