Chevrolet / GM Vortec 8100 8.1L Performance Parts

Want more power and better economy from your Chevy / GM Vortec 8100 8.1L engine? Our aluminum cylinder head, camshaft and modified intake manifold top end kits are a great place to start. On trucks primarily used for towing purposes, we recommend our stage 1 packages. In daily-driven street / strip applications, our stage 2 kits are a perfect fit, featuring more aggressive camshaft profiles and stainless steel roller rockers. Stage 3 has been developed to produce maximum power in naturally aspirated trucks and suvs using our max effort camshafts, forged pistons and forged connecting rods. Long tube headers are recommended with all of our Vortec 8100 performance parts kits.

8.1L Stock Displacement Performance Kits

vortec 8100 truck performance parts
Raylar Vortec 8.1L Truck Stage 1 - $3995

Our stage 1 truck performance package makes 440 horsepower & 490 ft-lbs of torque. Great for towing!

  • Big Power Aluminum Cylinder Heads
  • BP-202 High Torque Camshaft
  • ARP High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
vortec 8100 truck performance parts
Raylar Vortec 8.1L Truck Stage 2 - $5399

Our most popular 496 street package, the stage 2 truck performance package bumps the Vortec 8.1L to 525 horsepower & 580 ft-lbs of torque.

  • BigPower Aluminum Cylinder Heads
  • BP-203 Street / Strip Camshaft
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • Modified Stock Intake Manifold
  • ARP Re-torqueable High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
vortec 8100 8.1L truck performance parts
Raylar Vortec 8.1L Truck Stage 3 - $7259

For maximum power, our stage 3 truck performance package bumps the Vortec 8.1L to 610 horsepower & 640 ft-lbs of torque. 2400-2800 stall is recommended.

  • BigPower Aluminum Cylinder Heads
  • BP-206 Max Effort High-Lift Camshaft
  • Modified Stock Intake Manifold
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • ARP Re-torqueable High Strength Head Bolt Kit
  • BigPower Forged Flycut Pistons, Rings & Wristpins
  • BigPower Forged H-Beam Connecting Rods
  • 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
Raylar 511cid Stroker Truck Stage 1 - $7909

Perfect for heavy pulling, our forged 511cid stroker stage 1 truck performance package makes 460 horsepower & 505 ft-lbs of torque.

  • BigPower Aluminum Cylinder Heads
  • BP-202 High Torque Camshaft
  • Modified Stock Intake Manifold
  • 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
Raylar 511cid Stroker Truck Stage 2 - $8379

Our most popular forged 511cid stroker kit. The street / strip stage 2 truck 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 Stock 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
Raylar 511cid Stroker Truck Stage 3 - $8379

For maximum power from our forged 511cid stroker kit, the stage 3 truck performance package bumps the Vortec 8.1L to 625 horsepower & 660 ft-lbs of torque. 2400-2800 stall is recommended.

  • BigPower Aluminum Cylinder Heads
  • BP-206 Max Effort High-Lift Camshaft
  • Modified Stock Intake Manifold
  • 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
Raylar 540cid Stroker Truck Stage 1 - $8279

Use your truck for serious hauling? Our 540cid stroker truck towing stage 1 package makes 575 horsepower & 640 ft-lbs of torque.

  • BigPower Aluminum Cylinder Heads
  • ARP High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
  • BP-205 High Torque Camshaft
  • Modified Stock Intake Manifold
  • 4.75inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins
vortec 8.1L 540 stroker kit
Raylar 540cid Stroker Truck Stage 2 - $8679

Our most popular 540cid stroker kit street / strip package, the stage 2 truck 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 Stock Intake Manifold
  • 4.75inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins
vortec 8.1L 540 stroker kit
Raylar 540cid Stroker Truck Stage 3 - $8679

For maximum power from our forged 540cid stroker kit, the stage 3 truck 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 Stock Intake Manifold
  • 4.75inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins
  • *Shaft Mount Roller Rockers - Add $1300

Iron Cylinder Head Valvetrain Upgrades

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 your choice of four stock piston safe camshafts and 1.70 ratio stainless steel roller rockers.

  • Your Choice Of Camshaft:
  • BP-202 Towing / RV Camshaft
  • BP-203 Street / Strip Camshaft
  • BP-111-S Stock Piston Supercharger Camshaft
  • BP-212-T Stock Piston Turbocharger Camshaft
  • 1.70 Ratio Stainless Steel Roller Rockers

Want Even More Power?

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 kit in their 2006 Chevy Avalanche and made 521HP / 627FT-LBS with headers and stock exhaust.

540cid Chevrolet Avalanche Build

Vortec 8.1L Intake Manifold Modification

vortec 8.1l 496cid intake manifold porting Intake Manifold Modification - $950

For trucks not requiring maximum high-RPM airflow, we can modify your stock 496 / 8.1 liter intake manifold. This intake modification will increase airflow to your engine, still retain stock looks and passes emissions. We remove the stock plenum blockages inside the manifold to reduce restriction and free up horsepower and smooth the individual intake runners. Intake manifold modification does not replace the Cool Gap manifold but does offer about 80% as much airflow. Intake manifold modification will show gains throughout the RPM band.

Intake Manifold Video

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

"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!

Ceramic Spark Plug Wires

Raylar Truck Stage 1

Raylar Truck Stage 2

Raylar Truck Stage 3