block

GM Performance Parts
Product # 10051141	Bow Tie Aluminum Block
	This heavy-duty aluminum block is 47 pounds lighter than a production rear-wheel-drive cast iron block. It has extra-thick cylinder walls with dry nodular iron sleeves. The head bolt bosses are reinforced to improve head gasket sealing. This block has wider main bearing bulkheads than a production cylinder case; four-bolt caps are installed on the two intermediate main bearings. These billet steel main caps have splayed outer bolts that provide additional bearing support. The aluminum Bow Tie V6/60º block features a revised lubrication system. The "priority main feed" oiling is similar to a Chevrolet small-block V8, with three oil galleries above the camshaft; production V6/60º blocks have only two oil galleries. Oil is routed directly to the main bearings in a Bow Tie block to ensure proper lubrication at high rpm. The main bearing saddles are grooved to increase the flow of oil to the crankshaft journals through additional feed holes drilled in the upper bearing inserts. Block weight is 59 lbs.
Price $ ?	Web Address: https://www.spoperformanceparts.com/

GM Performance Parts
Product # 10185054	Heavy-Duty Composition Head Gasket
	This Teflon-coated gasket has solid pre-flattened wire O-rings around each cylinder. It is highly recommended for competition engines with 4.00" to 4.125" cylinder bores. Compressed thickness is .041". (Use with iron or aluminum heads).
Price $46.75 each	Web Address: https://www.spoperformanceparts.com/

GM Performance Parts
Product # 476543	Main Bearing Cap Bolt
	11mm x 3.66" long, for cast iron production block.
Price $7.55 each	Web Address: https://www.spoperformanceparts.com/

GM Performance Parts
Product # 10044990	Main Bearing Cap Bolt
	11mm bolt for outer holes on Bow Tie four-bolt caps.
Price $ ?	Web Address: https://www.spoperformanceparts.com/