Hardened exhaust seats for unleaded fuel compatibility. Manufactured with aircraft quality high grade aluminum alloy.Multi-angle seat design for improved flow at low lifts. Advanced port design for improved flow at all lifts.
Advanced combustion chamber design allows superb flame travel and burn. Additional pushrod clearance machined along outside port walls.Can use either early or late (Vortec) intakes. Can use either perimeter bolt pattern or centerbolt valve covers. Threaded accessory holes in ends of heads. Retains stock 23 degree angle and intake/exhaust bolt locations.
Thick deck to resist warping and allow for additional milling if desired. Does not require offset rocker arms.These heads will work for all small blocks including 400s (no steam holes). Heads are drilled for both the earlier style intake bolt pattern (pre'87) that had all bolts going in at an angle and the newer Vortec style that has 4 on each side going straight down in. Will not work with stock intake manifolds, must use an aftermarket raised runner intake. 2.10" T x 1.18" W. 1.4" T x 1.4" W.
Comes w/ 1.26" Z28 Style (Max is 1.625"). All assembled heads are assembled right here in Iowa in our machine shop and checked by our machinists before leaving! 1.26 diameter valve springs, good to.550" lift ("Flat Tappet Hydraulic or Solid Cams). Stainless steel 1 piece swirl polished valves.
3/8 shouldered screw in studs. To prevent any delays with your order you should watch for the following common issues.Addresses that only have a PO Box can cause long delays and almost always result with having to credit/cancel the order in the end. If the ord er requires multiple packages someone will need to sign for each one. Some items are not combined due to size or weight such as crankshafts, torque converters, radiators, cylinder heads, etc. Powered by SixBit's eCommerce Solution. The item "SBC Complete Aluminum Cylinder Heads Straight Plug 205cc. 550 Springs 3/8 Studs" is in sale since Wednesday, July 29, 2020. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "kmjperformance" and is located in Story City, Iowa.
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