L18 / 8.1L / Vortec 8100 / 496 Engine Swap Performance Parts

Building a street machine or muscle car with a GEN7 L18 / 496 big block Chevrolet? Our performance packages produce big power and exceptional reliability in L18 / 8.1L / 496 engine swaps. Our stage 1 performance kits give you everything you need to make 540 horsepower / 601 ft-lbs of tire shredding torque with very mild street manners. Stage 2 adds forged pistons and connecting rods, eliminating the weak links within the late model big block Chevy engine. Stage 2 also sees a more aggressive camshaft which produces 607 horsepower / 638 ft-lbs.

hot rod muscle car 496 performance parts
Hot Rod EFI 496cid Stage 1 - $5589

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

  • BigPower Aluminum Cylinder Heads
  • BP-203 Street / Strip Camshaft
  • Modified Intake Manifold
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • ARP Re-torqueable High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
hot rod muscle car 496 performance parts
Hot Rod EFI 496cid Stage 2 - $7299

Our stage 2 hot rod / muscle car performance package bumps the 496 / 8.1L to 607 horsepower & 638 ft-lbs of torque. 2400-2800 stall is recommended.

  • BigPower Aluminum Cylinder Heads
  • BP-206 Max Effort High-Lift Camshaft (must use with forged aftermarket pistons with deep valve relief)
  • Modified 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

Raylar 511 CID Stroker Performance Kits

Want even more power? Our 4.5" stroke crankshaft, forged h-beam connecting rods and forged pistons replace your exisiting rotating assembly adding cubic inches and more power. Direct replacement parts for your stock Vortec rotating assembly.

vortec 8.1L 511 stroker kit
511cid Stroker Hot Rod Stage 1 - $7599

Our most popular forged 511cid stroker kit. The street / strip stage 1 hot rod performance package bumps the Vortec 8.1L to 545 horsepower & 600 ft-lbs of torque.

  • BigPower Aluminum Cylinder Heads
  • BP-205 High Torque Camshaft
  • Modified Intake Manifold
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • ARP High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
  • 4.5inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins
vortec 8.1L 511 stroker kit
511cid Stroker Hot Rod Stage 2 - $8299

For maximum power from our forged 511cid stroker kit, the stage 2 hot rod performance package makes 625 horsepower & 660 ft-lbs of torque. 2400-2800 stall is recommended.

  • BigPower Aluminum Cylinder Heads
  • BP-206 Max Effort High-Lift Camshaft
  • Modified Intake Manifold
  • Billet Throttle Body
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • ARP Re-torqueable High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
  • 4.5inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins

Raylar 540 CID Stroker Performance Kits

Build the ultimate stock-block stroker! Our 4.75" stroke crankshaft, forged h-beam connecting rods and forged pistons replace your exisiting rotating assembly pumping up your displacement to 8.8L / 540cid! Requires block clearance work to fit in stock 8.1L engine blocks.

vortec 8.1L 540 stroker kit
540cid Stroker Hot Rod Stage 1 - $8559

Our most popular 540cid stroker kit street / strip package, the stage 1 hot rod performance package bumps the Vortec 8.1L to 650 horsepower & 670 ft-lbs of torque. 2400-2800 stall is recommended.

  • BigPower Aluminum Cylinder Heads
  • ARP High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
  • BP-206 Max Effort High-Lift Camshaft
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • Modified Intake Manifold
  • Billet Throttle Body
  • 4.75inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins
vortec 8.1L 540 stroker kit
540cid Stroker Hot Rod Stage 2 - $8559

For maximum power from our forged 540cid stroker kit, the stage 2 hot rod performance package uses the same camshaft found in our 632cid HO750. 685 horsepower & 680 ft-lbs of torque. 2800-3200 stall is recommended. Available with shaft mounted rockers for extra valve train stability.

  • BigPower Aluminum Cylinder Heads
  • ARP High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
  • BP-213 (HO750) Race Camshaft
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • Modified Intake Manifold
  • Billet Throttle Body
  • 4.75inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins
  • *Shaft Mount Roller Rockers - Add $1300

Keeping Stock Cylinder Heads?

vortec 8100 8.1L 496 camshaft swap kit
Roller Rocker & Camshaft Swap Kit - $969

Our full-roller camshaft kit for iron cylinder heads reuses stock head studs and fits under the stock valve covers. Includes the BP-203 camshaft and 1.70 ratio stainless steel roller rockers.

  • BP-203 Stage 1 Hot Rod Camshaft
  • 1.70 Ratio Stainless Steel Roller Rockers

Want More Tire Smoke?


1980 Oldmobile Wagon 8.1L Swap

8.1L / L18 / Vortec 8100 Swap Info

Looking for information on what it takes to drop an 8.1L engine in your vehicle?

Vortec 8.1L Engine Swap Information

Stage 1 Aussie Hot Rod Ute

Need A Tune?

We don't offer computer tuning, but we've met lots of good people who do. Check out our tuner list to find a tuner in your area.

8.1L Computer Tuning

521HP / 627FT-LBS 540CID Build

car craft 8.1L magazine article

Car Craft magazine put our 540 stage 1 truck kit in their 2006 Chevy Avalanche and made 521HP / 627FT-LBS with headers and stock exhaust.

540cid Chevrolet Avalanche Build

How Much Air Do Raylar Heads Flow?

raylar aluminum cnc cylinder head overlay vortec cylinder head

Raylar Big Power cylinder heads out flow every 496 / 8.1L cylinder head on the market. Our combustion chambers promote a more even burn, increasing engine efficiency, fuel mileage, improving driveability and reducing detonation in forced induction applications. 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

496 / 8.1L Swap Into 1969 Vette

8.1l engine swap into hot rod 69 corvette

Corvette Enthusiast magazine did an excellent job swapping an 8.1L engine into a 1969 Corvette. You can check out the full build article at the link below. (12MB)

8.1L Hot Rod Swap - '69 Corvette

L18 / 8.1L Vortec Swap Resource Thread

8.1l l18 engine swap resource

CK5 Forum has an excellent 8.1L engine swap resouce thread with great pictures and part numbers for those considering an L18 / 8.1L / 496 engine swap.

8.1L / 496 Swap Resource Thread

Oil Pan Manufacturers

"Header-Proof" Ceramic Spark Plugs

vortec 8.1l 496cid ceramic spark plug wires for engines with headers Ceramic Spark Plug Wires - $310

8.1L engines with short and long tube headers routinely melt stock plug wires and even performance spark plug boots. Ceramic spark plug wires eliminate burnt spark plug boots in boats, trucks, hot rods and RVs. If you've had this problem before or don't want to worry about it in the future, check out our 45 degree ceramic plug boots which are rated to withstand extreme temperatures up to 2000°F!