WebJan 23, 2024 · Intake was 263 cfm, exhaust was 190 cfm with pipe. This was at .500 lift with 2.02/1.60, right at 72%. These heads made 540hp on a 327 or 350-360 cubic inch. You will also notice the large step on the floor, mismatch for reversion helped out, I used 1.625 and 1.750 primaries. Jan 18, 2024. WebSmall-Port Vortec Bowtie Cylinder Head Assembly. $ 1,168.80 $ 1,078.20. The most powerful cast-iron heads offered by Chevy Performance. Completely assembled, ready to …
Cylinder Heads: GM Performance Motor
WebDescription: Small-Port Vortec Bowtie Casting Number: 25534351 Material: Iron Port Size: 185 Port Type: Vortec Valve Angle: 23 Chbr CC's: 66 Int Vlv: 2.000 Exh Vlv: 1.550 Exh Port: LT4 Plug Type: Straight Heat Riser: No … WebJun 12, 2024 · Re: Chevy performance 12691728 vs small port bowtie vortec. by F-BIRD'88 » Sat Jun 11, 2024 11:13 pm. These are not Bowtie Vortecs. (not small port nor large port ) They apear to be a new part number for the new revised oem L-31 production vortec heads. The old 96-2000 era 906 and 062 vortecs flow 228 cfm out of the box. randy opper course
Vortec Cylinder Heads - MotorTrend
WebApr 9, 2024 · For sale fresh Small Block Chevy Bowtie Small port Vortec Performance heads. These are the best performing heads Chevy ever made for Small Block Chevy`s. I have a set with all machine work done with all new seals 0.005 resurfaced, all new LS3 Beehive springs and new Comp Cam retainers and locks, with competition valve job. and … WebApr 29, 2009 · Joined Aug 16, 2008. 1,031 Posts. #5 · Apr 22, 2009. We have used the Vortec Bowtie heads on alot of our engines and the newer heads still have the 218 runners not 225 like they were talking. The big runner heads do have … WebLike the Chevrolet Vortec Bow Tie head, this original Bow-Tie head features no heat riser passage, induction hardened exhaust seats and is machined for screw-in studs. Bow Tie Head. With “UnderCover Porting” it is tough to beat. There are still a lot of Bow Tie headed motors running up front. randy ophus performance horses