The Texas Speed LS7 .750" Polished Dual Valve Spring Kit brings the PAC Racing 1209X RPM Series dual spring to the LS7. The 1209X carries a maximum valve lift rating of .750", and Texas Speed assembles it with titanium retainers, spring seats and valve seals. The kit uses the GM factory valve stem locks, which are not included, and the seat and seal are separate pieces rather than the Texas Speed integrated seat and seal.
Texas Speed recommends this kit for aggressive-lift hydraulic roller camshafts, low-lash solid roller cams run with factory GM rocker arms, engines turning 7,000 rpm and above, endurance racing and supercharged or turbocharged builds at 20 psi or more. Installed height is 1.800" with 160 lb of seat pressure, open pressure is 510 lb at 1.100" (.700" lift) and coil bind is 1.000". PAC recommends quality aftermarket lifters with these springs rather than OE lifters.
Specifications
- Engine: GM LS7 per Texas Speed
- Valve springs: PAC Racing 1209X RPM Series polished dual valve springs
- Maximum valve lift: .750"
- Installed height: 1.800"
- Closed (seat) pressure: 160 lb at 1.800"
- Open pressure: 510 lb at 1.100" height (.700" lift)
- Coil bind: 1.000"
- Retainers: Titanium
- Seats and seals: Separate pieces, not the TSP integrated seat/seal
- Valve stem locks: Uses GM factory locks, not included
- Lifters: PAC recommends quality aftermarket lifters; OE lifters not recommended
- Suited to: 7,000+ rpm, endurance racing, 20+ psi boost
Kit Includes
- PAC Racing 1209X polished dual valve springs
- Titanium retainers
- Spring seats (separate)
- Valve seals (separate)
Note: PAC recommends a quality set of aftermarket lifters with the 1209X springs. OE lifters are not recommended.
Note: This kit does not use the TSP integrated seat and seal; the seat and seal are separate. GM factory valve stem locks are used and not included.
Vehicle Applications
Application per Texas Speed: GM LS7. The vehicle list reflects the fitment Texas Speed publishes for this kit; the LS7 was offered in the Corvette Z06 and 2014-2015 Camaro listed below, so confirm the engine before ordering.
Chevrolet Camaro
- 2014 Chevrolet Camaro
- 2015 Chevrolet Camaro
Chevrolet Corvette
- 2006 Chevrolet Corvette
- 2007 Chevrolet Corvette
- 2008 Chevrolet Corvette
- 2009 Chevrolet Corvette
- 2010 Chevrolet Corvette
- 2011 Chevrolet Corvette
- 2012 Chevrolet Corvette
- 2013 Chevrolet Corvette
Vehicle applications reflect the fitment published by Texas Speed & Performance for this part number. Confirm your engine and cylinder head configuration before ordering.
FAQ
What engine is the Texas Speed LS7 .750" spring kit for?
It is built for the GM LS7, with a Texas Speed vehicle list covering 2006 to 2013 Corvette and 2014 to 2015 Camaro applications. Confirm the engine is an LS7 before ordering, since those models were also sold with other engines.
What is included in the LS7 .750" PAC 1209X kit?
The kit includes PAC Racing 1209X polished dual valve springs, titanium retainers, spring seats and valve seals as separate pieces. It uses GM factory valve stem locks, which are not included.
What are the spring specs for the PAC 1209X on the LS7?
Texas Speed lists a 1.800" installed height, 160 lb seat pressure, 510 lb open pressure at 1.100" (.700" lift), a maximum valve lift of .750" and coil bind at 1.000".
Can I use stock LS7 lifters with these springs?
PAC does not recommend it. Texas Speed passes along PAC's recommendation to run a quality set of aftermarket lifters with the 1209X springs instead of OE lifters.
How does the LS7 kit differ from the Texas Speed .750" LS spring kit?
Both use the PAC 1209X spring with identical published pressures and lift rating. The LS7 kit (TSP-LS7750Springkit) is assembled with the seats and seals for the LS7 cylinder head, while TSP-PACPOL750SpringKit is listed for the other LS engines.
