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Kiggly Racing Race Only Beehive Valve Spring Set | Mitsubishi 4G63 (SS-RACE)

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Kiggly Racing

Kiggly Racing Race Only Beehive Valve Spring Set | Mitsubishi 4G63

PART# KIG SS-RACE
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$ 399.00

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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

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

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MAP Limited Lifetime Warranty

1.) All MAPerformance in-house fabricated parts include a Limited Lifetime Warranty for the Original Purchaser. This warranty only applies to the original purchaser and is non-transferrable. If the product fails it would need to be determined by MAPerformance that it is due to manufacturing defects in materials or workmanship.

2.) This does not cover normal wear and tear. Improper use, modification, or abuse voids this warranty. MAPerformance will not be held responsible for additional costs due to the failure of a product (cost of sale, towing, labor, etc.). Warranty claims must be submitted to MAPerformance for review.

3.) You must create a support ticket to acquire your return authorization number prior to returning the product.

4.) Warranty claims will not be honored if the product was not purchased through an approved dealer.

For warranty evaluation please create a support ticket via this form Click Here For Customer Service.

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