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Products > Engine Top End > Top End Kits > Big Bore
Big Bore Top End Kit
Kit includes Delkron’s Hi-Flow assembled cylinder heads that are made from 20% stronger permanent mold castings and CNC machined for highest possible quality. They have nitrided stainless 2.02" intake valves and 1.610" exhaust valves with increased port diameters for improved flow. Upgraded springs and collars will accommodate up to .640" total lift making these heads a dream come true. Cylinders feature centrifugally spun cast iron liners integrally cast to aluminum to provide excellent thermal conductivity. Also includes Ross Racing Piston Kit and Cometic MLS Gasket Kit. This kit is a perfect fit for our Big Bore Crankcases. Available in natural or black finish.
 NEW! Diamond Cut Heads Now Available! Delkron is pleased to offer our top end components with Diamond Head’s patented Diamond Cut. This added bling not only makes our big fin packs sparkle but also helps dissipate heat. In fact, Diamond Cut components have been proven by engineers to cool your engine 12% faster than stock! And polishing is never needed — these components will sparkle and shine for a lifetime. Order your Top End Kit, Long Block or Complete Engine already Diamond Cut and ready to bolt on! For more information, visit www.diamond-heads.com
(this is designated in the part number using a DC)
Technical Specs
Bore size is 4.250" when used with 4.250 stroke crank assembly this will yield a 120 cubic inch square motor. Compression ratio of 10:1. Accepts stock rocker arms. However, for better rocker arm alignment on the valves when using high lift cams, choose Delkron's Billet Rocker Arm Supports sold separately (see Related Delkron Products below).
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Black
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Natural
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Links (PDF Format)
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Delkron Big Bore Top End Kit
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