Product Description
Michigan Motorsports 11 Degree 245cc CNC Cathedral Port LS Heads
Fits 1997-2013 LS-Based Engines with Cathedral Port Intakes LS1 LS6 LS2 LQ4 LQ9 5.7L 6.0L 383 408 416
These fully CNC machined cylinder heads from Michigan Motorsports feature a revised 11 Degree valve angle for unmatched performance compared to standard 15 degree LS heads. Designed for 3.810"+ bore engines with cathedral port intake manifolds. Extra-thick deck surfaces help alleviate head gasket sealing issues in power-adder applications. Great for Naturally Aspirated, Boosted, or Nitrous applications. The 245cc intake port has been flow bench tested to over 350cfm and is ideal for feeding the airflow demands of high RPM 5.7L-6.0L stock bottom end combinations or larger displacement stroker engines. Heads come fully assembled with stainless steel valves and polished PAC dual valve springs with titanium retainers suitable for most hydraulic roller applications. These are 6 bolt castings to fit aftermarket blocks but work great on factory 4-bolt blocks as well. Due to the revised valve locations, these heads will require the use of LS3 style intake rocker arms.
Features:
- 6 bolt pattern: Can be used on Aftermarket 6 bolt blocks or Factory 4 bolt blocks
- 11 Degree valve angle for improved performance compared to typical 15 degree LS1 heads
- 63cc CNC Machined Combustion Chamber
- 245cc CNC Ported Intake Runner
- Hand blended valve job
- Extra Thick.750"+ Deck Surfaces
- PAC Dual .660" Valve Springs with Titanium Retainers Installed
- 2.080" Stainless Intake Valves, 1.570" Stainless Exhaust valves
- Hollow Stem Intake Valve upgrade available (see options)
- Maximum Recommended Valve Lift: .650"
- Billet rocker stands included - Uses LS3 Intake Rocker Arms
- Fits 3.810" and larger bore blocks
- Retains standard intake and exhaust port locations to accept commonly available intake manifolds and headers.
- Requires head gaskets with a minimum 4.000" bore size. LS9 Gaskets recommended for most factory-block applications.
- Clearance for 3/8" Diameter Pushrods. Depending on camshaft, lifter and rocker arm selection, typical required pushrod length will be in the 8.100-8.250" range.
- Sold/Priced as a pair
Developed in conjunction with Hooper's Heads in Houston, TX, bringing decades of experience in high end race engine airflow and applying it to a budget friendly, easy to bolt-on head package.
