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Ported 821 LS3 cylinder heads.

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This is a pair of 821 LS3 square port Cylinder heads, ported by Eric Roycroft. Upgraded valves .660 BTR Springs with Ti retainers. Great upgrade from cathedral …

SKU: GSSM821heads

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$1,600.00

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Product Details

Product Details

This is a pair of 821 LS3 square port Cylinder heads, ported by Eric Roycroft. Upgraded valves .660 BTR Springs with Ti retainers. Great upgrade from cathedral port, or Camaro, Corvette, Silverado with stock castings. Ready to bolt on. These heads have less than 10 passes on them, made 500 rwhp with stock shortblock LS3 with BTR Stage IV camshaft on our in-house Mustang MD 500 chassis dyno. Very nice heads. Upgraded to LS7 heads and no longer need them.

These heads are for 6.0/6.2 with 4" or larger bore, LS3, LS2, LQ4, LQ9. Good deal on good heads. Can provide rocker rails.

Video featuring Eric Roycroft who ported the heads. The heads in the video are not these heads.

f needed.