Kiggly Racing Race Only Beehive Valve Spring Set (4G63)

SKU: KIG SS-RACE

Price:
$ 399

Description

Kiggly Racing Race Only Beehive Valve Spring Set

Kiggly Racing LLC Race Only Beehive Valve Spring Set for high rpm and high boost 4G63 applications requiring extremely high seat pressure. This kit is made in the USA and includes an aggressive PAC Racing beehive spring, FEA-optimized proprietary hardened chrome moly retainers and treated steel seats. This is a drop-in fit with all standard 4g63 components including keepers and seals.

These springs are for serious builds only with a no-shim seat pressure of 131lb and can be shimmed 0.060" to 150lb at 0.470" /12mm lift. This high seat pressure keeps the valves from popping off the seat due to pressure waves up to ~62psi in most applications. By adding 0.060" shims (available through our store) extends allowable boost in most applications to ~73psi

The limiting factor in the 4G63 valvetrain is typically boost levels, not RPM. To protect against this, we recommend targeting seat pressure at about 1.7x your absolute manifold pressure (boost + 14.7psi). This tends to be the worst case scenario and varies widely with the engine’s parts combo.

Features

  • Fits all 4G63 engines including DSM and EVO
  • Compatible with all popular cam profiles
  • Recommended for applications running 50psi or more boost
  • 100% Made in the USA
  • Seat pressure = 131lbs at 1.530"
  • Rate = 310lb/in
  • Max recommended lift = 0.500"
  • Min recommended spring height at full lift = 1.000"
  • Not for use in street cars due to stress and wear induced to other valvetrain components

Applications

  • 1990-1999 1G / 2G DSM
  • 2003-2006 Mitsubishi Evo 8/9

What's In The Box?

  • (16) Chromoly Steel Retainers
  • (16) PAC Racing Springs
  • (16) Treated Steel Seats

Warranty

  • Manufacturer Standard Warranty

Customer Reviews

No reviews yet
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)

Payment & Security

Amazon American Express Apple Pay Diners Club Discover Klarna Mastercard PayPal Venmo Visa

Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.

You may also like

Recently viewed