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LS1/LS6 Performance Cylinder Heads | Sport Bike Parts | Nitrous Headquarters
LS1/LS6 Performance Cylinder Heads
We offer many different performance packages to suit your needs.
Stage 1 Performance Package ($1000+core charge): These heads feature stock valve size for those of you who wish to retain your factory warranty. These heads generally flow 280-290 c.f.m. @ .575 lift and are a great addition to a somewhat stock vehicle. Parts include: Isky single springs, Lunati retainers, new G.M. locks, and new G.M. locators.
Stage 2 Performance Package ($1900+core charge): These heads are great for mid range and high r.p.m. use. Along with bolt-ons and a cam, these heads will create up to 435 horsepower at the rear wheels. This package includes your choice of Comp or Isky springs, Lunati retainers, Ferrea 2.02 x 1.55 stainless valves, and flow up to 310 c.f.m. @ .575 lift
Stage 3 Performance Package ($2200+core charge): These heads are for the those who own street cars that see a moderate amount of track use. 440+ horsepower at the rear wheels is very realistic with these heads along with sub 11 second quarter mile times!!!! This package includes your choice of Comp or Isky springs, Lunati retainers, Ferrea 2.055 x 1.6 stainless valves, hardened steel valve seats, and flow upwards of 320 cfm @ .600 lift.
Stage 4 Performance Package ($3800 and up): These heads are for the customer that leave their baby parked in the garage, and only bring it out to kick some Ass!!! There are many, many hours invested in these heads to put them miles ahead of any competition. We outfit these heads with after market valve guides, hardened steel valve seats, 2.080 x 1.6 stainless Ferrea valves, double springs, titanium locators, titanium retainers, and they flow 340+ c.f.m. @ 600 lift. These heads are ONLY recommended on BIG INCH motors, or a stock cube engine with a BIG power adder-- such as nitrous, turbo or supercharger.
