Engine & Exhaust

Allstar Exhaust Block Off Plates SBC Std 1pc Aluminum ALL34212 Aluminum block off plates seal standard and spread port SB Chevy exhaust ports during engine storage or repairs. Plates protect against moisture, dust and dirt. Alternate Description ...

Allstar 18mm O2 Sensor Bung Angled ALL34152 Hard-to-find O2 sensor fittings work in a variety of uses. Alternate Description 18MM O2 SENSOR BUNG ANGLED Part Number ALL34152 Vendor Part Number ALL34152 UPC Code 848238019247 ...

Allstar 18mm O2 Sensor Plug ALL34150 Hard-to-find O2 sensor fittings work in a variety of uses. Alternate Description 18MM O2 SENSOR PLUG Part Number ALL34150 Vendor Part Number ALL34150 UPC Code 848238019230 Package Weight...

Allstar Check Valve Only for Crankcase Evac Kit ALL34146 Alternate Description CHECK VALVE ONLY FOR CRANKCASE EVAC KIT Part Number ALL34146 Vendor Part Number ALL34146 UPC Code 848238072693 Package Weight 0.45 lbs 0...

Allstar Pulley Shim Kit Crank ALL31066 Use shim kits to properly align pulleys. Water pump shims have dual bolt hole pattern to fit most GM and Ford water pumps. Crank pulley spacers are for small block Chevy's. Kits include three shims. Alternate...

Allstar Pulley Shim Kit Water Pump ALL31064 Use shim kits to properly align pulleys. Water pump shims have dual bolt hole pattern to fit most GM and Ford water pumps. Crank pulley spacers are for small block Chevy's. Kits include three shims. ...

Allstar Pulley Guide (Each) ALL31035 Hard-coated aluminum pulley guide helps retain drive belt. Guide is .085" thick with a 1.00" ID, 1/8" keyway slot, and a 2.500" OD. The same guide is found in ALL31031 Mandrel Kits. Sold each. Alternate...

Allstar Stepped Washer For 31030 Pulley ALL31034 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...

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 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...