Name: Ready-to-Go Race Head for GX390, 420cc, and 460cc
Brand: GoKarts®
SKU: ready-to-go-race-head-for-gx390-420cc-and-460cc
Availability: InStock

Home Store

Ready-to-Go Race Head for GX390, 420cc, and 460cc

Select Select Valve & Spring Combo

Select Select Amount to be Milled

From $87.50

Original: $250.00

-65%

Ready-to-Go Race Head for GX390, 420cc, and 460cc—

$250.00

$87.50

Select Select Valve & Spring Combo

Select Select Amount to be Milled

From $87.50

Original: $250.00

-65%

Ready-to-Go Race Head for GX390, 420cc, and 460cc—

$250.00

$87.50

The Story

Uses aftermarket GX390 style large-port casting. Heads are ported, bead blasted, flowed, and milled. Heads can be fitted with either single or dual springs. Single springs are recommended for 306 and smaller cams; dual springs are recommended for 307 and larger cams.

Choose a 36 or 40mm Intake Valve, comes with 32mm Exhaust Valve.

Increased milling can increase compression, but at the expense of reliability. ** .120 Not Recommended.

Product Includes:

Ported & Bead Blasted Head, Milled to Specs
Oversize Stainless Intake & Exhaust Valves
Aluminum or Titanium Retainers
Split Keepers
HD Single or Dual Springs
Valve Spring Shims
3-Angle Valve Job

Ready-to-Go Race Head for GX390, 420cc, and 460cc - Image 2

Details & Craftsmanship

Every detail has been carefully considered to bring you the perfect product.

Description