Product Description
BTR Canted Valve Rectangle Port LS3 Cylinder Heads
CNC Ported | Assembled | 64cc Chamber | 6-Bolt Castings
Sold/Priced as a Pair (2) of BTR-CVH3C-6A Heads
What happens when you combine two lifetimes of cylinder head research and development? The BTR CV cylinder head for LS! When you have a cylinder head casting legend like Rick Smith on board (Father of the Hi-Port, A460, Twisted Wedge and more!) and decades of Brian Tooley's porting & cylinder head flow bench experience, you end up with serious game-changing performance!
There’s no other low-cost premium cast all-American canted-valve LS cylinder head on the market! By rotating the intake 5° and exhaust 3°, these heads have seen over 370+ CFM of intake flow at only .650” lift with BTR's in-house port program! Brian Tooley Racing has put NASCAR-proven canted valve tech into the LS head and made it attainable for the masses. These heads use regular Gen 3 & 4 LS1 pedestal type rockers, rocker bolts, valve covers & manifolds… and use Gen V LT valves, spark plugs and valve spring packages to make building them out EASY with OEM-compatible parts! If you have a street machine or a racing class that allows a canted valve head, this is the advantage you’ve been waiting for.
These cylinder heads are sold as a pair and ship fully machined and CNC ported with finished valve guides and seats installed. LT1 type valves are installed to correct height with BTR's .660" lift Platinum spring kit, ready for your stock type LS1 rocker arm setup, then bolt-on and go!
- Canted-valve design allows for maximum valve unshrouding and sizing
- This Rectangle Port head fits a 3.820" or larger bore
- 11° intake (5° canted) and 13° exhaust (3° canted)
- 6-Bolt Casting: Can be used on factory GM 4-Bolt blocks, or aftermarket 6-Bolt Blocks
- Cast in Iowa - Designed, tested, machined & sold in Kentucky!
- LS3 style port finished to 260cc - Combustion Chamber finished to 64cc
- Intake flow - Over 370 CFM at .650” when used with BTR’s port program!
- Uses OEM LT1 2.125” steel hollow-stem intake and 1.590” steel exhaust valves
- LT4 Ti intake and L8T Inconel exhaust valves can also be used with lash caps (These valves and lash caps are not included)
- Superior OEM-type powdered metal guides
- Utilizes OEM-style straight LS1 pedestal rockers, OEM-style intake & exhaust manifolds, and LS-style valve covers
- Uses Gen V LT style long reach spark plugs and valve spring kits up to 1.350” O.D. spring
- Clears 3/8” pushrods – Typical length intake 7.925-8.025” & exhaust 7.900-8.000”
- Extra-thick .750” boost-friendly deck in popular “6-bolt” configuration
- BTR / Wiseco Canted-Valve specific pistons available for most popular LS applications (typical "Stage 4" and smaller camshafts will fit with factory pistons)
- Due to the chamber size, a 4.100" bore head gasket is required (such as LS9, LS3 or Cometic gaskets) even when used on smaller bore engines.
- These heads are ~.430" taller than a factory head at the valve cover rail. Please verify alternator/brake booster etc clearance for fitment before ordering.
- Sold/Priced as a Pair
INSTALLATION NOTES: Uses LS1 rocker bolts. M10x1.5 Accessory hole commonly used for dipstick is shallower than OEM to prevent water jacket intrusion, please check your dipstick bolt prior to final assembly. Like many aftermarket heads, a sealant will be required on intake rocker bolt threads that intersect the port. ALWAYS VERIFY NEVER ASSUME all engine clearances before final assembly.
