Product Description:
LS7 Cylinder Head Porting Service – Customer Supplied Heads
Elevate your LS7 engine's performance with our Precision Race Components (PRC) LS7 CNC 265cc Porting Service. This service is for customer-supplied cylinder heads and includes CNC porting, a valve job, guide replacement, and optional milling. Our extensive R&D and dyno testing ensure industry-leading power and airflow gains, with flow improvements of up to 35 CFM over the stock GM LS7 head.
What’s Included in the Service?
CNC Porting: Fully CNC-ported intake and exhaust ports for maximum airflow and efficiency.
CNC Valve Job: Precision valve seat machining for enhanced sealing and performance.
New CHE Bronze Guides: Replaces factory guides with high-performance CHE bronze guides for improved durability and heat resistance.
Reuse Factory Valves: Retains factory 2.200" titanium intake valves.
New Stainless Steel Valve Exhaust: Includes stainless steel 1.610" exhaust valves for improved durability.
Optional TSP Spring Kit: Add PAC valve springs and titanium retainers for enhanced high-RPM stability.
Complete Assembly: Heads are cleaned, ported, and assembled with premium components.
Proven Results:
The PRC LS7 cylinder heads deliver unmatched power and airflow, making them one of the most affordable and powerful LS7-based options on the market. Extensive testing ensures peak performance for street, track, and racing applications.
Flow Data (@ 4.125" Bore Plate, Superflow 600):
Lift (in.) Stock LS7 Intake (CFM) Stock LS7 Exhaust (CFM) PRC LS7 Intake (CFM) PRC LS7 Exhaust (CFM)
0.200 161 114 169 119
0.300 227 171 248 179
0.400 291 193 308 211
0.500 330 203 351 224
0.600 351 209 383 235
0.650 353 204 388 241
0.700 353 209 393 246
Important Notes:
Customer Supplied Heads Only: We do not supply castings; this service is for customer-provided heads only.
Shipping Instructions: Please remove all cylinder head accessories (spark plugs, coolant plugs, steam port blocks, etc.) before shipping.
Disclaimer: Texas Speed & Performance is not responsible for any lost parts left on the heads.
