Raylar Performance Parts Engine Packages

We’ve developed our complete engine series to make it smooth, and seamless for 496 – 8.1 liter engine users to change out their stock engine to a Raylar engine without the difficulty or loss of time sometimes associated with engine rebuilding.

Raylar picked brand new 8.1 liter 496cid engine blocks, puts them through an exacting and precise methods of align honing, decking, boring and honing. These big block engines, were coupled with precision re-assembly with Raylar’s special forged pistons, rods, "alumina" bearings, high performance oil pumps and timing sets. These blocks were then fitted with oil pans, timing covers, cams, and heavy-duty balancers. This line of engines worked best for 496 – 8.1 liter engines owners with damaged motors, or engines in need of overhaul.

Raylar no longer builds complete engines for the marine industry. Instead, we've created simple "Plug & Play" performance parts packages which contain all of the parts neccessary to create any of our engines from your stock 496.

mercury marine mercruiser 496 performance parts
525HO - $6989

Our stage 1 marine performance package bumps the 496 / 8.1L to 540 horsepower & 601 ft-lbs of torque.

  • BigPower Aluminum Cylinder Heads
  • BP-203 Street / Strip Camshaft
  • CoolGap EFI Intake Manifold
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • ARP Re-torqueable High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
mercury marine mercruiser 496 performance parts
600HO - $8699

Our stage 2 marine performance package bumps the 496 / 8.1L to 607 horsepower & 638 ft-lbs of torque.

  • BigPower Aluminum Cylinder Heads
  • BP-206 Max Effort High-Lift Camshaft (must use with forged aftermarket pistons with deep valve relief)
  • CoolGap EFI Intake Manifold
  • Billet Throttle Body
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • BigPower Forged Flycut Pistons, Rings & Wristpins
  • BigPower Forged H-Beam Connecting Rods
  • ARP Re-torqueable High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
mercury marine supercharged mercruiser 496 performance parts
650 SRC - $4459

Our stage 1 marine supercharger performance package bumps the 496 / 8.1L to 650 horsepower & 645 ft-lbs of torque.

  • BigPower Aluminum Cylinder Heads
  • BP-111S Supercharger Camshaft
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • ARP Re-torqueable High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
  • *Supercharger not included in kit.
mercury marine supercharged mercruiser 496 performance parts
800 SRC - $5999

Our stage 2 marine supercharger performance package bumps the 496 / 8.1L to 804 horsepower & 824 ft-lbs of torque.

  • BigPower Aluminum Cylinder Heads
  • BP-207S Supercharger High-Lift Camshaft (must use with forged aftermarket pistons with deep valve relief)
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • BigPower Forged Flycut Pistons, Rings & Wristpins
  • BigPower Forged H-Beam Connecting Rods
  • ARP Re-torqueable High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
  • *Supercharger not included in kit.

Want Even More Power?

Hear Raylar's Stage 1 Camshaft


Cool Gap Intake Manifold

Stock intake manifolds can’t meet the air flow demands of your engine in performance applications. Our Cool Gap intake manifold has been engineered for one purpose, maximum airflow and power output in marine applications. Our intake manifold incorporates long, high velocity runners to provide excellent low and mid-range torque levels and a large plenum volume to satisfy this engine’s demand for more air at higher RPM’s. Our design keeps the incoming air fuel mixtures cool and dense, producing more power and torque over the entire power band.

  • 4 Available Throttle Body Openings
  • 78MM (3 bolt / LS1 style)
  • 80MM (Ported 3 bolt / LS1 style)
  • 90MM (4 bolt / LS2 style)
  • Unlimited Edition (Dual 1000CFM Carb-Plate EFI)
Cool Gap Intake Manifold

How Much Air Do Raylar Heads Flow?

Raylar 496 BBC cylinder heads out flow every 8.1L cylinder head on the market. Check out the flow numbers for our standard Raylar CNC heads and our special-order CNC Extreme cylinder heads using the link below. We’ve included the Dart Iron Eagle 8.1L cylinder head in both 4.5 and 4.26 bores for comparison.

Cylinder Head Flow Comparison

marine engine performance parts