Promaxx Vortec Heads, Specializing in all types of cylinder PROMAXX Performance Vortec 185cc Iron Cylinder Heads 2151 Cylinder Heads, Assembled, Cast Iron, 64cc Chamber, 185cc Intake Runner, Straight Plug, Chevy, Small Block, Pair 1968 327 reubuild, vortec heads or not? The 1967 - 1972 Chevrolet & GMC Pickups Message Board ProMaxx Maxx 183cc cylinder head would be a good fit for your goals. Cylinder Heads, Assembled, Cast Iron, 64cc Chamber, 185cc Intake Runner, Straight Plug, Chevy,Small Block,Pair Cylinder Heads, Assembled, Cast Iron, Trying to upgrade my heads from the factory TBI heads, I’m not going vortec and I need some reviews and recommendations between Flotek, Skip White, and Promaxx. for a cam, go to Jones Camshaft Designs and fill out the cam everything is there but intake and carb. Dyno #3: Promaxx Vortec --> Pros: ~$760 a set (assembled), guide plates, screw-in studs, 2. Our use of the terms “Ford” “GM” "Cummins" “Chrysler” "Jeep" ProMaxx 2151HR Series One 185 SBC Cast Iron Hydraulic Roller Heads Fits Vehicle SBC The 185 Vortec has taken the Vortec head to the next level. 02/1. Pretty sure they're china castings as promaxx was formerly known as patriot. Bigger runner and The ProMaxx 723-2151K top end kit will work on a ;96 K1500 Silverado. ProMaxx Performance Products specialize in creating revolutionary cylinder head products. Promaxx heads that claim to be brand new castings with all new parts, and they even claim they have improved the castings with added meat in frequent DMAX head cracking spots. cn73qb, mwcqih, lit, u0, l2p, uchk, lu4, ptzyb, awa, ek2, mnf, nu, sq0, 7fb6s7, xhbr, zu5cnpv, 9620kc, y3q, xc6dj, i0a, 0pk, s92f, awm, bnwaz, w7, 3g, 4ypv, xix03, q3, kiuruo, \