Engine & Exhaust

Allstar Crank Pulley Mandrel ALL31032 Kit prevents mandrel bolt breakage and is made specifically for use with Allstar ALL31030 crank pulley. Mandrel is attached to the crankshaft pulley with three bolts, while the vibration damper is retained with the...

Allstar Crank Pulley 2 Groove 4.750in Dia ALL31030 Specifically for short or Corvette water pumps, pulleys work with power steering pump and pulley to provide a ratio within the GM specified RPM range. Race engine RPM differs greatly from street engines...

Allstar LS Coil Mounting Bracket Black Steel Pair ALL26212 TIG welded valve covers with a thick billet rail available with or without coil mounts. Tall design to clear most aftermarket valvetrain. Fill cap (with O-ring seal), gaskets and bolts included...

Allstar Valve Covers SBC Steel Black w/Tubes ALL26147 Steel small block Chevy valve covers are an excellent alternative to more expensive and heavier aluminum valve covers. Sold in pairs, one cover is solid without holes and one cover includes two fully...

Allstar Valve Covers SBC Steel Zinc w/Tubes ALL26145 Steel small block Chevy valve covers are an excellent alternative to more expensive and heavier aluminum valve covers. Sold in pairs, one cover is solid without holes and one cover includes two fully...

Allstar Valve Covers SBC Steel Raw w/Tubes ALL26143 Steel small block Chevy valve covers are an excellent alternative to more expensive and heavier aluminum valve covers. Sold in pairs, one cover is solid without holes and one cover includes two fully...

Allstar Rear Main Seal Adapter 86-up Pan ALL26126 Billet aluminum adapter allows installation of a two piece style crankshaft seal and early (pre-1986) crankshaft into a 1986 and newer SB Chevy (pre-LS) engine. Adapters include mounting hardware...

Allstar Crank Adapter LS to Older GM Converters ALL26121 Crank adapter sleeve allows use of an early TH350/TH400 style transmission with an LS engine. Simply insert adapter sleeve into the crankshaft end to center the torque converter pilot with the...

Allstar 400 Balancing Plate Balance plate ALL26120 Plate is installed between crankshaft flange and the flywheel allowing a popular internally balanced Chevy 350 flywheel to be used with an externally balanced 400 crankshaft. Note: These are not designed...

Allstar Performance GM LS Oil Galley Plugs Billet Aluminum ALL90068 Galley plug commonly referred to as a “Barbell" are used by the factory to divert oil to the factory oil filter and prevent unfiltered oil from circulating through the engine. The...

Allstar Performance GM LS Oil Galley Plugs OE Style Nylon ALL90067 Galley plug commonly referred to as a “Barbell" are used by the factory to divert oil to the factory oil filter and prevent unfiltered oil from circulating through the engine. The...

Allstar Performance GM LS Coolant By-Pass/Crossover Plugs ALL31170 Plugs provide a location to bleed air from cooling system of most GM LS engines. Replace factory original plugs or use in place of factory crossover steam tubes. Kit includes two plugs...