Oldsmobile 400 425 455 2PC RMS 166 Tooth DNA® Billet Black Oxide SFI Flexplate You cannot over-shift and miss

You cannot over-shift and miss a gear with Speedmaster automatic shifter

and one 3mm spacer

Let everyone know where you go for high performance aftermarket parts and accessories with the Speedmaster soft shell jacket

Their strong die-cast aluminum design ensures an excellent gasket seal and dissipates heat better than many other covers

on dedicated cam-grinding machines

Oldsmobile 400 425 455 2PC RMS 166 Tooth DNA® Billet Black Oxide SFI Flexplate You cannot over-shift and missSpeedmaster flexplates are the best on the market, made from 4340 round bar to exact tolerances. This one piece billet steel flexplate offers the strongest gear teeth, the least runout, and best longevity on the market. Every Speedmaster flexplate is 29. 2 SFI Approved and will withstand the extreme power and rpm of your performance application.