Duromax 500 / Rato R500-V Head and Valvetrain Parts – Big Block Clones LLC

CHECK OUT OUR NEW SELECTION OF DUROMAX 500 PARTS HERE!

CAST SMALL BLOCK SIDE COVERS AND FORGED 58MM CRANKS ARE BACK IN STOCK!

236cc SHORT BLOCK KITS IN STOCK STARTING AT $347! CLICK HERE!

SHREDDER STAGE 1 AND RPM+ ARE DEAD! THE CNC PORTED LEVEL II HAS TAKEN THEIR PLACE! CLICK HERE FOR DETAILS

Duromax 500 / Rato R500-V Intake and Exhaust Parts
Duromax 500 / Rato R500-V Intake and Exhaust Parts

Duromax 500 / Rato R500-V Intake and Exhaust Parts
Duromax 500 / Rato R500-V Head and Valvetrain Parts

Duromax 500 / Rato R500-V Head and Valvetrain Parts
Duromax 500 / Rato R500-V Internal Engine Components

Duromax 500 / Rato R500-V Internal Engine Components
Duromax 500 / Rato R500-V Flywheels, Coils, Shrouds, and Recoils

Duromax 500 / Rato R500-V Flywheels, Coils, Shrouds, and Recoils
Duromax 500 / Rato R500-V Bundles and Kits

Duromax 500 / Rato R500-V Bundles and Kits

1 5

Big Block GX390 and Clone - 65lb Dual Valve Spring Set

Sold out

Big Block GX390 and Clone - 65lb Dual Valve Spring Set

Regular price $15.95 USD

Regular price Sale price $15.95 USD
Unit price per

Sold out
Big Block GX390 and Clone - Keepers - GX390-Predator420-Duromax 440-Wildcat 460-GX500

Big Block GX390 and Clone - Keepers - GX390-Predator420-Duromax 440-Wildcat 460-GX500

Regular price $15.95 USD

Regular price Sale price $15.95 USD
Unit price per
Rato R500-V Rocker Arm

Rato R500-V Rocker Arm

Regular price $9.95 USD

Regular price Sale price $9.95 USD
Unit price per
Valve Spring Shims for Big Block Wedge Head and GX390 Clones - 0.015" Thick

Valve Spring Shims for Big Block Wedge Head and GX390 Clones - 0.015" Thick

Regular price $4.95 USD

Regular price Sale price $4.95 USD
Unit price per
Duromax 500 / Rato R500-V Side Cover Dowel Set

Duromax 500 / Rato R500-V Side Cover Dowel Set

Regular price $2.95 USD

Regular price Sale price $2.95 USD
Unit price per
Duromax 500 / Rato R500-V Exhaust Valve

Duromax 500 / Rato R500-V Exhaust Valve

Regular price $9.95 USD

Regular price Sale price $9.95 USD
Unit price per
Rato R500-V Valve Cover Gasket

Rato R500-V Valve Cover Gasket

Regular price $5.95 USD

Regular price Sale price $5.95 USD
Unit price per
Duromax 500 / Rato R500-V Intake Valve

Duromax 500 / Rato R500-V Intake Valve

Regular price $9.95 USD

Regular price Sale price $9.95 USD
Unit price per
Duromax 500 / Rato R500-D / R500-V Rocker Arm Shaft Retainer Plate

Duromax 500 / Rato R500-D / R500-V Rocker Arm Shaft Retainer Plate

Regular price $3.99 USD

Regular price Sale price $3.99 USD
Unit price per
Big Block GX390 - Keepers - For 6.5mm Aftermarket Type Valves With Titanium Retainers

Big Block GX390 - Keepers - For 6.5mm Aftermarket Type Valves With Titanium Retainers

Regular price $31.95 USD

Regular price Sale price $31.95 USD
Unit price per
Duromax 500 / Rato R500-V Steel Valve Retainer Set

Duromax 500 / Rato R500-V Steel Valve Retainer Set

Regular price $12.95 USD

Regular price Sale price $12.95 USD
Unit price per
Duromax 500 / Rato R500-V Stock Replacement Valve Spring Set

Duromax 500 / Rato R500-V Stock Replacement Valve Spring Set

Regular price $14.95 USD

Regular price Sale price $14.95 USD
Unit price per
Big Block GX390 and Clone - Titanium Dual Spring Retainer Set - GX390-Predator 420-Duromax 440-Wildcat 460-GX500-ZS GB620 - Pair

Big Block GX390 and Clone - Titanium Dual Spring Retainer Set - GX390-Predator 420-Duromax 440-Wildcat 460-GX500-ZS GB620 - Pair

Regular price $35.95 USD

Regular price Sale price $35.95 USD
Unit price per
Rato R500-V Valve Cover

Rato R500-V Valve Cover

Regular price $29.95 USD

Regular price Sale price $29.95 USD
Unit price per
Duromax 500 / Rato R500-V Rocker Arm Shaft

Duromax 500 / Rato R500-V Rocker Arm Shaft

Regular price $6.95 USD

Regular price Sale price $6.95 USD
Unit price per
Duromax 500 / Rato R500-V Pushrod Set

Duromax 500 / Rato R500-V Pushrod Set

Regular price $19.95 USD

Regular price Sale price $19.95 USD
Unit price per
Duromax 500 / Rato R500-V Cylinder Head

Duromax 500 / Rato R500-V Cylinder Head

Regular price $79.95 USD

Regular price Sale price $79.95 USD
Unit price per