More boost demands a stronger valvetrain. This kit gives you quality valve springs with titanium retainers so the engine stays stable at higher RPM after a charger upgrade.
Torture tested at 11,000 RPM, with no power loss, a higher RPM operating range and a lifetime warranty. Made in the USA.
- Fits 2004-2012 RXP, RXT, RXP-X, RXT-X
- Springs plus titanium retainers
- Tested to 11,000 RPM
- Lifetime warranty, made in the USA