Page 12 of Buick Performance Parts Catalog by TA Performance

480-922-6807 Order and Tech Line www.TAPERFORMANCE.com TA Performance Products, Inc. 12 V8 CYLINDER HEADS 1 2 3 2.300 Intake valve available as an option, please inquire. 3/8 or 11/32 valve stem diameters available, please specify. 2.300 Intake valve, full porting and chamber work All heads have the original type bolt pattern on the end of the head, for the accessory brackets! 400-430-455 Race Cylinder Heads Chamber CCs CFM (max) Int./Exh. CFM (base) Int./Exh. Valves Int./Exh. Application Power Potential Camshaft Head Bolt/Stud Kit Rocker Assembly Exhaust Manifold Headers Intake Manifold SP2, Custom SP2, Custom Oval Port Headers Oval Port Headers Stage 3 Roller, TA Shaft Mount Stage 4 Roller, TA Shaft Mount Stage 2 Stage 2 Hyd, Solid or Roller Roller 600-900 + 700-900 + Hot Street Race Race 2.250 1.800 2.250 1.800 58 58 300 230 385 270 325 230 395 270 STAGE 3 STAGE 4 Tall Port Tall Port Not legal for use in California on pollution controlled vehicles. * * 1 2 2 3 3 Notes About The Four Additional Head Bolts The use of these extra bolts/studs are OPTIONAL. We recommend using them on combinations over 600 HP. When developing our cylinder heads we took the opportunity to incorporate four additional head bolt/stud locations on the exhaust side of the head. Doing so increased the number from a very conservative 10 bolts to a much better 14 per head. On Stage 2,3 4 series heads the positions are fully incorporated in the heads, and are ready to use. On the Stage 1 series heads, the positions are drilled approximately 75% from the under side and spot faced on the topside. If the extra positions are going to be utilized then you will continue drilling the holes from the underside. We rent a drill fixture kit for incorporating the additional 4 head stud locations on the cylinder block. The jig is only $25 to use (a refundable deposit also applies) and consists of a drilling jig and tapping jig plus necessary drill bits, taps and fixture hardware. We highly recommend the use of the drill jig when incorporating the holes to ensure that they are in the correct location and are straight. Using a gasket or the head itself as a guide usually will not give as good of results as using the fixtures. The four new locations will go directly into the water jacket, therefore, use of sealant on the threads of the bolts/studs during head installation is required. Also note that over the counter head gaskets will not have provisions for the four extra head bolts. TA Performance head gaskets such as our Orange Crush, Cometics (multi layer steel) and Copper series will all have the additional hole locations incorporated.

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