HKS Step2/Step3 Outer Valve Spring Set SR20DE(T) 22001-AN002

Vehicle Fitment

• 1991-2000 Infiniti G20 (SR20DE(T))
• 1991-1998 Nissan 180SX (RPS13, SR20DET)
• 1999-2002 Nissan Silvia S15 (SR20DET)
• Nissan 200SX SE-R (SR20DE)

Fitment Notes

• Outer valve springs only
• Step2/Step3 upgrade - intended for use with high-lift aftermarket camshafts; confirm your specific cam profile's spring pressure requirements match this spring rate

Features

• Stiffer springs specifically engineered to match the characteristics of HKS camshafts
• Prevents valve float and maintains proper valve-to-cam contact when running high-lift cam profiles
• Stringent shot-peening and heat treatment process for durable, consistent spring rates over time
• Low-inertia design reduces risk of valve float and coil-bind at high RPM

Specifications

• Upgrade Level: Step2/Step3
• Type: Outer valve springs
• Construction: Heat-treated, shot-peened spring material

Included Components

• 1x Set of Outer Valve Springs

Product Description

The HKS 22001-AN002 is a Step2/Step3 outer valve spring upgrade set built for the Nissan/Infiniti SR20DE(T) engine, covering applications like the Infiniti G20, Nissan 180SX, Silvia S15, and 200SX SE-R. As valve train dynamics change with higher-lift aftermarket cam profiles, stock springs can no longer keep pace - these springs are precisely matched to the characteristics of HKS camshafts to maintain proper valve-to-cam contact.

Manufactured using high-quality materials with a stringent shot-peening and heat treatment process, these springs deliver durable, consistent spring rates over time while remaining low-inertia to reduce the risk of valve float or coil-bind at high RPM. A common pairing for SR20-powered builds running upgraded HKS camshafts as part of a complete head rebuild.