Quote:
Originally Posted by PJ305
NHRA has approved 4 aftermarket cylinder heads for SBC stock engines for 2018. It's up to you to look up your engine in the guide and choose the ones listed for your combo,
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RHS Cast Iron heads # 12400 & 12402 accepted as replacement head
Edelbrock heads # 60887, 60637 accepted as replacement head
Dart Cast Iron heads with cast # 10021070, 100220010 accepted as replacement head
World Products Cast Iron heads with cast #'s 043600 & 043610 accepted as replacement heads
Got it thank you, I see a +5hp goes with these too.