KPMI Valve Spring Kit - Kibblewhite HD .600 Lift Twin CAM 88-103" — Harley-Davidson (2004-2017)

KPMI Kibblewhite valve spring kit engineered for .600 lift Twin Cam 88–103 applications, wound from premium Kobe Super-Clean Chrome Silicon wire and heat-treated for durability. Designed using advanced spring simulation software to optimize harmonics, stress, and operating RPM for reliable high-lift performance.

Features

• Premium Kobe Super-Clean Chrome Silicon wire construction
• Heat-treated and stress-relieved
• Shot peened for fatigue resistance
• Engineered for .600 lift Twin Cam 88–103 cams

Specifications

• Brand: KPMI
• Manufacturer Part #: 20-20364
• Length: 4.9 in
• Width: 7.45 in
• Height: 2.3 in
• Weight: 1.46 lbs

Fitment

Designed for Twin Cam 88–103 engines with .600 lift camshafts. Verify your specific cam profile and lift before ordering.

Frequently Asked Questions

What lift camshaft is this kit designed for?

This kit is engineered specifically for .600 lift Twin Cam 88–103 cams. Confirm your cam's lift specification before purchase.

Are these compatible with stock Twin Cam heads?

Yes, these mount in stock Twin Cam 88–103 head positions. Ensure proper valve clearance and seat contact after installation.

Do I need to install a new cam at the same time?

These springs are matched to .600 lift cams. If upgrading your cam, order springs engineered for your new cam's specifications.

What makes KPMI springs different?

KPMI uses premium Kobe Chrome Silicon wire, heat-treat, stress-relief, and shot peening, plus computer-aided design for harmonic and stress optimization specific to your application.