Workhorse 8.1L Vortec 8100 Motorhome / RV Performance Parts

Improve towing power and fuel economy! Raylar’s performance package for Workhorse chassis equipped motorhomes & RVs is a simple, reliable, bolt-on performance system. Our RV performance package consists of Raylar aluminum cylinder heads, high-torque camshaft and high strength roller rocker arms. The camshaft used in our motorhome & RV package is designed for truck and RV use with fuel economy, emissions compliance and peak pulling power of primary importance. It has a very minor exhaust note but provides ample low and mid-range pulling and passing power. Included in the kits are accessories such as cometic MLS head gaskets and ARP head bolt kits. Our vortec engine kit for the Workhorse series of motorhomes & RVs provide a complete system allowing you to achieve incredible increases in the power, reliability and efficiency from your engine.

workhorse chassis motorhome rv performance parts
Workhorse RV / Motorhome Stage 1 - $4459

Our stage 1 Workhorse chassis RV / motorhome performance package bumps the 496 / 8.1L to 440 horsepower & 490 ft-lbs of torque. Our motorhome kit fits Workhorse chassis W25.5, W24, W22, W20, W18, W16, SSC (Super Sport Chassis) & UFO.

  • Big Power Aluminum Cylinder Heads
  • BP-202 High Torque Camshaft
  • 1.7 Ratio SS Roller Rockers & AFN nuts
  • ARP High Strength Head Bolt Kit
  • Cometic MLS Head Gasket Set
vortec 8.1L 511 stroker kit
Workhorse RV / Motorhome Stage 2 - $7909

Perfect for heavy pulling, our forged 511cid stroker stage 2 RV 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 540 stroker kit
Workhorse RV / Motorhome Stage 3 - $8279

Use your RV for serious hauling? Our 540cid stroker stage 3 RV 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
raylar 8.1l 496 stroker kit
Raylar 511cid Stroker Assembly - $2969

Direct replacement parts for stock Vortec rotating assembly.

  • (511cid stock bore / 518cid 0.030 over)
  • 4.5inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins
540 stroker kit
Raylar 540cid Stroker Assembly - $3269

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.

  • (540cid stock bore / 547cid 0.030 over)
  • 4.75inch Stroke Forged Crankshaft
  • Forged H-beam Connecting Rods
  • Forged Flycut Pistons
  • Rings & Wristpins
Stroker Kits Video
workhorse chassis motorhome rv performance parts
Banks 8.1L Workhorse Power Pack - $2399

Our cylinder heads and camshaft kits perform even better when your workhorse chassis motorhome is equipped with a Gale Banks power pack! You’ll see additional towing / passing power and improved fuel economy with a free flowing intake, long tube headers and free flowing exhaust system from Banks.

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, valve springs and fits under the stock valve covers. Includes the BP-202 towing / rv camshaft and 1.70 ratio stainless steel roller rockers.

  • BP-202 Towing / RV 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

Workhorse Performance Kit Video

521HP / 627FT-LBS 540CID Build

car craft 8.1L magazine article

Car Craft magazine put our 540 motorhome stage 3 kit in their 2006 Chevy Avalanche and made 521HP / 627FT-LBS with headers and stock exhaust.

540cid Chevrolet Avalanche Build

511cid / 540cid Stroker Kits

Need even more horsepower and torque from your Workhorse chassis? Expect incredible gains in the low and mid-range powerband with our fully forged 511cid or 540cid stroker kits. These kits creates extra cubic inches within the engine, giving you more pulling power. Comes with 4.5 inch or 4.75 inch stroke forged crankshaft, forged connecting rods, forged pistons, rings and wristpins.

Stroker Kits Video

Workhorse Intake Manifold Modification

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

we can modify your stock 496 / 8.1 liter intake manifold. The stock workhorse intake manifold opens to an air dam routing air deeper into the manifold, restricting airflow and adding heat. Modifying your stock 8.1 liter intake manifold will increase airflow to your engine. 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 will provide gains throughout the entire RPM band. Intake modification is essential if you are considering one of our stroker kits.

Intake Manifold Video