Butler Pro Billet Pontiac Timing Set, Double Roller, 9 Keyway, Standard, BPI-TCS-STD

Butler's own billet double roller timing set — made in the USA for Butler by SA Gear. Heat treated and pre-stretched billet steel gears with a 9-keyway crank sprocket, the same set COMP sells as the 7115.

About the chain. Fitted with a Rolon double roller chain (L.G. Balakrishnan & Bros) — the same chain supplied in the equivalent COMP Cams 7115 set. Heat treated and pre-stretched, it holds timing well at RPM. For the longest-lived chain we sell, look at the Rollmaster Red Series with the one-piece IWIS Pro Series full roller.

The 9-keyway crank sprocket gives 8 degrees of advance or retard in 2-degree increments at the crank. The crank-to-cam relationship is 2:1, so that lands as 1-degree steps at the camshaft. Keyways are a solid fixture — they will not creep or walk the way an offset dowel can. Follow our Camshaft Degree Instructions and put the cam exactly where the card says.

Fits: Pontiac 326, 350, 389, 400, 421, 428, 455, plus aftermarket IAII and MR2 blocks.

Fitment — read this before you assemble. Pontiac crank gears were slip-fit from the factory, and aftermarket crank snouts vary. The billet crank sprocket in this set may need to be honed to the fit you want — some builders prefer a tight fit, some want a stock slip-fit. Check it on the bench, not in the block. More in our Pre-Assembly Tips.

Not sure which set your build wants? Our Cam Selection Guide walks through it, and you can always ask a Butler tech — we build these engines every day.