In keeping up with the GM’s trend of larger bore sizes and increased displacement, AFR is proud to release the 215 version of the popular Gen III product line which is aimed specifically to maximize 4” bore combinations (364 – 408...

Heads, AFR 215cc LS1 Cylinder Heads CNC Ported w/ 64cc chamber assembled w/ 2.02" / 1.60" Valves, dual coil valve springs(.600" max lift), & titanium retainers, Pair     For over thirty years Airflow Research has been defining...

Precision Race Components all new cylinder head castings completed with 247cc runners. For 408 cubic inch and larger applications with 4.03"+ bore sizing.   MADE IN THE USA!! CAST IN THE USA!! MACHINED IN THE...

Precision Race Components all new cylinder head castings completed with 237cc runners. For 370 cubic inch and larger applications with 4.00"+ bore sizing.   MADE IN THE USA!! CAST IN THE USA!! MACHINED IN THE...

Precision Race Components all new cylinder head castings completed with 227cc runners. For stock cubic inch LS1/LS2 applications requiring smaller chambers for extra compression.   Features:  227cc Fully CNC Ported Intake...

2004 & Later LS2/LS3/LS7 Cylinder Head Bolt Kit New GM Kit of 15 bolts for 2004 & later LSX engines 1 kit per cylinder head; order 2 per engine Head bolts are torque to yeild so they cannot be reused on LSX engines

97-2003 LS1/LS6 Cylinder Head Bolt Kit New GM Kit of 15 bolts for 98-02 Camaro/Firebird LS1 & 97-03 Corvette C5 LS1/LS6 1 kit per cylinder head; order 2 per engine Head bolts are torque to yield so they cannot be reused on LS...

Gasket, New GM 7-Layer Steel LS9 Head Gasket Kit, Pair. Will also fit LSA supercharger engines. Bore (in)   4.100 in. Bore (mm)   104.140mm Gasket Material   Composite Compressed Thickness (in)   0.051 in...

Main Stud Kit, ARP 4-Bolt Main Cap Stud Kit LS1/LS6/LS2 These ARP main studs are made from 8740 chromoly steel and have a 190,000 psi tensile-strength rating. They are precision centerless-ground and thread-rolled to Mil-S-8879 specs, with a black oxide...

Gasket, New GM Multi Layer Steel LS1/LS6 5.7L Head Gaskek Kit, Pair

ARP Head Bolts Fits 1997-2003 GM Gen III 4.8L 5.3L 5.7L 6.0L LS Engines These ARP High Performance series head bolt kits are tough! They are rated at 170,000 psi--15 percent stronger than Grade 8 fasteners. They come available with hex heads or reduced...

ARP Head Bolts Fits 2004-2020 GM Gen IV 5.3L 6.0L 6.2L LS Engines. These Pro series cylinder head bolts from ARP are cold-forged to ensure molecular integrity. They are heat-treated prior to thread rolling and machining, and are rated at a whopping...