So, you’re in the market for some serious power? Let me tell you about these Precision Race Components 247cc Cylinder Heads. If you’re running a 408 cubic inch engine or larger with a bore size of 4.03 inches or more, these heads are going to be a game changer for you.
First off, these aren’t just any cylinder heads. They’re crafted, machined, and cast right here in the USA, which means you’re getting quality you can trust. The 247cc runners are designed specifically for LS cathedral port setups, and they’ve been flow bench tested to push out over 360 CFM—yeah, you read that right. That’s some serious airflow.
What makes these heads stand out? For starters, they come with fully CNC ported intake runners at 247cc and exhaust runners at 84cc. This means you’re getting precision that you can feel when you hit the gas. Plus, they’re equipped with a TSP .660 Spring Kit featuring PAC valve springs and titanium retainers—lightweight but tough. The chambers are CNC machined to 68cc and the CHE bronze guides ensure smooth operation.
And let’s not forget about the valves. You’re looking at 2.120-inch hollow stem intake valves paired with 1.600-inch stainless exhaust valves. They’re factory rocker friendly, so you won’t have to worry about compatibility issues when you’re upgrading your setup.
Now, let’s talk fitment. These heads are a great match for a variety of models, including:
Just a heads up, these are competition use only and not legal for road use in California or similar states, so make sure you check your local regulations before you pull the trigger.
In short, if you’re looking to unlock some serious performance and take your LS engine to the next level, these 247cc cylinder heads are worth considering. They’ve got the specs, the build quality, and the performance you need to dominate on the track.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Make Vehicle | Model | Year |
|---|---|---|
|
2004-2007 Cadillac CTS-V |
CTS-V | 2004-2007 |
|
2005-2014 Cadillac Escalade |
Escalade | 2005-2014 |
|
1998-2002, 2010-2015 Chevrolet Camaro |
Camaro | 1998-2002, 2010-2015 |
|
1997-2013 Chevrolet Corvette |
Corvette | 1997-2013 |
|
2014-2017 Chevrolet SS |
SS | 2014-2017 |
|
1999-2013 Chevrolet Silverado 1500 |
Silverado 1500 | 1999-2013 |
|
2000-2014 Chevrolet Suburban |
Suburban | 2000-2014 |
|
2000-2014 Chevrolet Tahoe |
Tahoe | 2000-2014 |
|
2006-2009 Chevrolet TrailBlazer |
TrailBlazer | 2006-2009 |
|
2009-2013 GMC Sierra |
Sierra | 2009-2013 |
|
1999-2014 GMC Yukon |
Yukon | 1999-2014 |
|
1998-2002 Pontiac Firebird |
Firebird | 1998-2002 |
|
2008-2009 Pontiac G8 |
G8 | 2008-2009 |
|
2004-2006 Pontiac GTO |
GTO | 2004-2006 |

Texas Speed and Performance began as a small business in 2003. Texas Speed and Performance is situated in Georgetown, Texas, and is a leader in the LSx sector. Texas Speed & Performance has quickly established itself as one of the largest performance makers and retailers of premium LSX and LT1 packages in the United States. Texas Speed and Performance founders, Trevor Doelling and Jason Magnum, have a combined 30+ years of experience in the high-efficiency sector and are constantly striving to research and manufacture the highest quality performance goods for your car. This is accomplished by putting their products through their paces on their in-house futuristic super flow engine dyno. Texas Speed and Performance components can be found in some of the fastest street and competition automobiles in the country.
WHY CHOOSE TEXAS SPEED AND PERFORMANCE?Texas Speed and Performance provides all levels of aftermarket performance products from LSx and 2014+ 6.2L LT1/LT4 performance parts, aftermarket cast cylinder heads, basic air induction exhaust, camshafts, stroker engines and in-house machining of all their engines. They are one of the largest LSx and 2014+ 6.2L LT1/LT4 specific shops in the country. Owing to their in-house cylinder head manufacturing, engine assembly, and camshaft grinding facility, they assist customers with all of their high-performance LSx and 2014+ 6.2L LT1/LT4 needs and requirements.
TEXAS SPEED AND PERFORMANCE PRODUCT LINETexas Speed and Performance Exhaust offers camshafts, short and long blocks, turn-key engines, valvetrain, crankshafts, rods, and aftermarket cylinder heads.
VIVID RACING-TEXAS SPEED AND PERFORMANCEThe Texas Speed and Performance products at Vivid Racing include the Texas Speed and Performance Stage 4.2 LS7 Camshaft Chevrolet Camaro, Corvette 2006-2015, which has fitment for the Chevrolet Camaro 2012-2015 and Chevrolet Corvette 2006-2013 models.