American Heritage Performance/ AHP Archangel LS7 Cylinder Heads

These are the heads powering the worlds fastest n/a 427ci Stock Bottom End C6z06 (Sebastian/SIRP Tuning) running 8.895s @154mph in the quarter mile

Highest flowing LS7 Cylinder Head on the Market!!! They have a nice and tight/small intake runner (275cc intake Runner) not a hogged out intake runner like many of the other heads on the market. This helps to keep intake air velocity very high which translates into amazing power and torque at all RPMs

Based on the Aftermarket Brodix BR7 LS7 Cylinder Heads but with our proprietary AHP CNC Porting program, AHP Valve guides and AHP Valve Seats

Custom AHP Performance Valve Job with Hand Blending (45 degree intake seat and 45 degree exhaust seat for added durability and longevity)

AHP Moldstar90 Valve Guides (same valve guide material used in many Formula 1 and Indy Car Cylinder Heads)

AHP 2.250" Titanium Molybdenum Intake Valves or Hollow 2.250" SS Intake Valves (note Hollow SS Valves are included in the base pricing)

Ferrea F2042p 1.615" light weight Hollow Stem Exhaust Valves (included in the base pricing) or Ferrea 1.615" inconel exhaust valves (optional on drop down menu) or New Late Model GM 1.615" Lightweight Sodium Exhaust valves (optional on drop down menu)

Select either PAC 1207x Dual Valve springs with titanium retainers, PAC 1209x Dual Valve springs with titanium retainers, PSI 1516ml Beehive valve springs with titanium retainers, PSI 1511ml Beehive valve springs with titanium Retainers, or New Stock GM LS7 Springs with Stock Steel Retainers... Note if selecting Hollow SS Intake Valves you must select either PAC 1207x, PAC 1209x or PSI 1516ml valve springs (no other springs will work with the Hollow SS Intake Valves)... If running the stock camshaft select either GM LS7 springs or PSI 1511ml springs

Uses Stock LS7 Rocker Arms but you can also run CHE LS7 rockers, Comp BSR LS7 shaft mount rockers (our favorite LS7 rocker arm) or Yella Terra Roller Rockers

275cc intake runner / 99cc exhaust Runner

72cc- 54cc combustion chambers (Select from drop down menu... Note stock GM LS7 heads are 70cc chambers and will put you at 11.1 compression with the stock LS7 Pistons. 66cc would be 11.7 compression with stock LS7 bottom end and stock GM LS7 head gasket)

Uses Gasketed Spark plugs not tapered spark plugs like the stock GM LS7 castings (select your spark plug heat range from drop down menu)

Ideal Cylinder heads for Max Power N/A Builds, Boosted Builds and or Larger displacement (427ci and up) builds. They also work well on a otherwise bone stock LS7 engine and best of all Require NO Tuning when bolted onto an other wise bone stock LS7

These heads work with stock 4 bolt GM blocks as well as Aftermarket 6 bolt blocks (LSX, LSR, Dart LS Next, RHS).

You can use ARP Head Bolts or ARP Head Studs with these heads (your choice)

Minimum Bore size required to run these heads is 4.120"