Frankenstein M311 Cylinder Head - Assembled - 2.165/1.600 in Valve - 273 cc Intake - 71 cc Chamber - LS3 - GM LS-Series Valves 18 Acceleration Programs: 88450 Chevy Small Bock Gen Size:Medium AERFCM4025

18 Acceleration Programs:

5" (4" w/ mounting tabs) x 1"

Be Sure to check out all of our products from Earl's Performance Products including Earl's Performance Products Cap and Plug Fittings

these are the same high quality 16 fin per inch cores that AFCO has always featured

All RaceQuip pants feature a high-quality heavy duty Nomex ® backed brass zipper installed with a double overlap for a more secure front opening

Frankenstein M311 Cylinder Head Assembled 2.165 1.600 in Valve 273 cc Intake 71 cc Chamber LS3 GM LS Series Valves 18 Acceleration Programs: 88450 Chevy Small Bock Gen Size:Medium AERFCM4025 18 Acceleration Programs: 5" (4" w mounting tabs) x 1"