Texas Speed & Performance's .660" lift dual valve spring kit built specifically for the Gen V LT engine family, which needs a taller installed height than LS engines. Texas Speed developed it with PAC Racing Springs to give excellent valvetrain control with aggressive hydraulic roller camshafts while still working with factory-style lifters. PAC polishes and nano-peens the springs to fight fatigue and extend spring life, and the PRC integrated seat and seal means no special seal installation tools and no torn or popped-off valve seals.
Fits: 2014+ GM Gen V LT engines: LT1, L83, L86, L84, L87 and L8T (5.3L, 6.2L and 6.6L)
Kit includes:
- (16) American-made PAC Racing polished dual valve springs, Gen V LT specific, rated to .660" lift
- (16) Patent-pending Precision Race Components (PRC) integrated spring seat / valve seal
- (16) Titanium retainers
Specs:
- Installed height: 1.900"
- Closed pressure: 160 lb @ 1.900"
- Open pressure: 406 lb @ .650" lift, 425 lb @ .700" lift
- Maximum recommended lift: .660"
- Coil bind: 1.090"
Notes:
- Uses the GM factory valve stem locks (not included)
- Does NOT fit the LT4 supercharged engine
- Integrated seat/seal fits factory-size valve guides only, not aftermarket bronze guides
