HKS Valve Springs for 4G63 DSM/Evo (22001-AM001)

HKS valve springs for the 4G63 Evo 1-7, 1G/2G DSM and GVR4 are sold as the complete set of 16. These can be used with the stock retainers. If you are using these in an Evo 8/9 head, you must use OEM DSM retainers.

Vehicle Fitment:
Mitsubishi 4G63
1992-2001 Evolution I-VII
1990-1999 Eclipse GST/GSX
1990-1998 Talon TSi
1990-1994 Laser RS
1991-1993 Galant VR4

More from HKS:
HKS valve springs are stiffer springs specifically designed for use with HKS camshafts. As valvetrain dynamics change with the use of high performance cam profiles and greater lift, stiffer valve springs are needed to optimize valve movement. When changing to a high lift cam, stock springs cannot match the increased valve train movement. Therefore HKS engineered valve springs that are precisely matched to the characteristics of HKS camshafts.

A stringent shot-peening and heat treatment process is applied to the HKS valve springs to provide durable and consistent spring rates over time. Applications with high revving engines will benefit from HKS valve springs, as the risk of valve-float and coil-bind is greatly reduced due to their specific design and construction.