Page 14 of Buick Performance Parts Catalog by TA Performance

480-922-6807 Order and Tech Line www.TAPERFORMANCE.com TA Performance Products, Inc. 14 V8 CYLINDER HEADS Intake Exhaust PRICING Assembled PLEASE CALL Bare Castings $1695.00 On our Stage 4 heads we moved the intake pushrod in order to widen the intake runner. Though the CFM is similar to our Stage 3 heads, the wider runner does a better job at complimenting increased intake volumes as found with Nitrous, Alcohol or Forced Induction combinations. Because we moved the intake pushrod, the Stage 4 heads do require the use of a roller camshaft with offset (TA 1414) roller lifters. A closed combustion chamber design which measures 58 ccs increases the compression ratio without having to use a domed piston, which reduces rotating weight. Ported Stage 4 Heads flow almost 395 CFM at high lift and an amazing 345 CFM at .500 ! Stage 4 exhaust ports can be ported to 270+ CFM. Stage 4 heads require a raised runner intake manifold from our SP-2 series with additional port matching or a custom made sheet metal manifold. Use of these heads does require Stage 2 style headers. Headers or manifolds used on Standard, Stage 1 or TAs Stage 1 aluminum heads will not work. Stage 4 heads also require a unique roller rocker set due to the re-located valve centers and repositioned intake pushrods. On 11:1 Compression engines out of the box performance is usually 80+ HP. These heads can support pump gas combinations up to 700+ HP and race combinations up to 900+ HP. Stage 4 Primary Use: - When the highest performance full race head is required for the most extreme combinations - When Hood clearance is not an issue - When the purchase of headers, rockers, intake, etc are not an issue - When 11:1 or more compression is desired Ask about other upgrades such as even larger 2.300 Intake Valves! Stage 4 Tall Port Port Configurations Dave Mongeon Guelph, Ontario, Canada `87 Skyhawk, 529 cid (Buick 455 bored and stroked), TA Ported Stage 4 Heads, TA Roller Cam, Alcohol Injected, Powerglide w/ 9 Converter, Ford 9 Rear Best E.T. 8.11 166.68 mph Sleeving Tubes Thin walled brass or stainless tubing for sleeving pushrod or head bolt holes that have been ported through. Available in 12 lengths in most popular diameters. GBT001B 1/2 diameter brass tube, per foot .......................................................$ 3.00 GBT002B 17/32 diameter brass tube, per foot ..................................................$ 3.00 GBT001S 1/2 outside diameter stainless tube for V6 head bolt holes, per foot ....$ 5.00

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