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2 LSU and NEVER requires free-air calibration when used with AEM’s 30-4110 Wideband UEGO AFR Gauge. Angle plug, 65cc chambers, 7/16 studs, guide plates, springs are set. If I wanted to stay close to the performance of those heads today. I was going to buy these for my car when I came across the Victor Jr's for half price of new. Only about 6 eigth mile passes on them and maybe a couple trips around the block. AFR 195cc SBC “Eliminator” Street Cylinder Head The Ultimate Bolt-on Emissions Legal Street Weapon The AFR Emissions Legal (versions from 1969-94 with heat riser, CARB EO #D-250-2), 195cc intake port small block Chevy cylinder heads are available in your choice of straight or L98 angle plug versions. AFR 210's, carb help & car set up ?'s The 210's outflow almost every head out there. BuyAFR AFR SBF 195 Competition Port Aluminum Race Head - 195cc SBF "Renegade" 20° Competition Head Click to enlarge AFR`s 195cc "Competition" heads feature 100% CNC ported intake, exhaust & chambers, A356 aluminum castings and high quality components throughout.