The Texas Speed Dual Spring Cam Kit bundles the valvetrain parts needed for a camshaft swap on LS1, LS2 and LS6 cathedral-port engines. The package pairs a Texas Speed camshaft of your choice with the TSP .660" dual spring kit and hardened chromoly pushrods in the length your combination needs.
The .660" dual spring package uses PAC Racing polished dual valve springs with titanium retainers, hardened spring seats and new valve stem seals, which supports higher-lift camshaft profiles than the factory springs allow. Texas Speed reports typical gains of roughly 30 to 65 rear-wheel horsepower from a cam swap, depending on the camshaft selected and supporting modifications. A tune is required after installation.
Specifications
- Application: LS1, LS2 and LS6 cathedral-port cylinder heads
- Valve springs: TSP .660" dual spring kit with PAC Racing polished dual springs
- Retainers: Titanium
- Spring seats: Hardened steel
- Valve stem seals: New seals included
- Pushrods: Texas Speed hardened chromoly, 5/16", set of 16, length selected at ordering (7.200" to 7.550")
- Camshaft: Texas Speed cathedral-port grind selected at ordering
- Typical gain reported by Texas Speed: 30 to 65 rear-wheel horsepower
Kit Includes
- Texas Speed camshaft (selected at ordering)
- TSP .660" dual spring kit with PAC Racing polished dual valve springs (TSP-PACPOL660SPRINGKIT)
- Titanium retainers
- Hardened spring seats
- New valve stem seals
- Texas Speed hardened chromoly pushrods, set of 16 (length selected at ordering)
Ordering Options
This kit requires two selections when ordering: the Texas Speed camshaft and the pushrod length. Optional add-ons offered by Texas Speed for this kit include an oil pump, timing chain set, front cover gasket kit, pushrod length checker and rocker arm trunnion upgrade kit.
Note: Pushrod length should be verified on the engine. The required length can vary by up to .050" depending on the camshaft core, lifters, cylinder heads and other valvetrain parts. Texas Speed offers an adjustable pushrod length checker for this purpose.
Vehicle Applications
Engine families covered: Gen III LS 4.8L, 5.3L, 5.7L and 6.0L, and Gen IV LS 4.8L and 5.3L, with cathedral-port heads.
Chevrolet Camaro
- 1998 Chevrolet Camaro
- 1999 Chevrolet Camaro
- 2000 Chevrolet Camaro
- 2001 Chevrolet Camaro
- 2002 Chevrolet Camaro
Chevrolet Corvette
- 1997 Chevrolet Corvette
- 1998 Chevrolet Corvette
- 1999 Chevrolet Corvette
- 2000 Chevrolet Corvette
- 2001 Chevrolet Corvette
- 2002 Chevrolet Corvette
- 2003 Chevrolet Corvette
- 2004 Chevrolet Corvette
- 2005 Chevrolet Corvette
- 2006 Chevrolet Corvette
- 2007 Chevrolet Corvette
Cadillac CTS-V
- 2004 Cadillac CTS-V
- 2005 Cadillac CTS-V
- 2006 Cadillac CTS-V
- 2007 Cadillac CTS-V
Cadillac Escalade
- 2005 Cadillac Escalade
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 is included in the Texas Speed Dual Spring Cam Kit?
The kit includes your choice of Texas Speed camshaft, the TSP .660" dual spring kit with PAC Racing polished dual springs, titanium retainers, hardened spring seats, new valve stem seals and a set of 16 hardened chromoly pushrods in the length you select.
Which cylinder heads does this cam kit fit?
It fits LS1, LS2 and LS6 cathedral-port cylinder heads, which includes most 1997 to 2007 Corvette, 1998 to 2002 Camaro and Firebird, 2004 to 2007 CTS-V and 1999 to 2007 GM truck cathedral-port engines.
What camshafts can be chosen with this kit?
Texas Speed offers its cathedral-port LS grinds with this kit, including truck stage cams, the 220R, 224R, 228R and Torquer series, naturally aspirated stage cams, turbo cams and the Cleetus McFarland grinds. The camshaft is chosen when ordering.
How do I know which pushrod length to order?
Pushrod length depends on the camshaft core, lifters and cylinder heads in your engine and can vary by up to .050". Texas Speed recommends checking length with an adjustable pushrod checker before ordering the final set.
Why use .660" dual springs instead of beehive springs?
Dual springs rated for .660" lift support the more aggressive camshaft profiles in the Texas Speed lineup and give more margin at high rpm than a single beehive spring, which is why this kit is the step up from the beehive spring cam kit.
Is a tune required after installing this kit?
Yes. A custom tune is required after any camshaft swap so the engine idles and runs correctly with the new profile.
