LS3 Heads and Cam Kit – Using Customer-Supplied Cylinder Heads

Upgrade your LS3-powered engine with our Heads and Cam Kit designed to deliver significant performance gains! This kit uses customer-supplied cylinder heads, which are fully CNC-ported to maximize airflow and paired with premium components for a complete high-performance setup. With the option to choose a camshaft tailored to your application, this kit offers unbeatable power and flexibility.

What’s Included in the Kit?

CNC-Ported Customer-Supplied Cylinder Heads:
- Fully CNC-ported for optimal flow and performance.
- Precision CNC valve job for enhanced sealing.
- Includes new stainless steel hollow 2.165" intake valves and 1.60" stainless steel solid exhaust valves for improved durability and flow.
- Includes .660" dual valve springs with titanium retainers, ready for aggressive camshaft profiles.
Choice of Texas Speed & Performance Camshaft:
- Select from a variety of camshaft profiles to match your engine’s setup and intended use.
- Designed to provide significant horsepower gains while maintaining drivability.
Texas Speed Chromoly Pushrods:
- Premium 5/16" chromoly pushrods for superior strength and durability.
- Customers select the pushrod length tailored to their setup.

Proven Performance Gains:

With extensive flow bench and dyno testing, this kit delivers significant power increases over stock components. By combining CNC-ported heads, a performance camshaft, and premium valvetrain components, you can expect gains of up to 70+ HP, depending on your specific camshaft choice and supporting modifications.

Technical Specs (Flow Bench Testing @ 4.000" Bore):

Lift (in.)	Intake (CFM)	Exhaust (CFM)
0.200	154	115
0.300	223	170
0.400	282	198
0.500	324	211
0.600	351	228
0.650	358	232

Important Notes:

Customer Supplied Heads Only: We do not supply cylinder head castings; this service is for customer-provided heads only.
Shipping Instructions: Please remove all accessories (spark plugs, coolant plugs, steam port blocks, etc.) before shipping. Texas Speed & Performance is not responsible for any lost parts.
Tuning Required: Proper tuning is necessary to maximize performance gains and ensure drivability.