LS3 / L92 / L99

GPI – LS3 / L92 / L99 CNC Cylinder Heads Porting Service

From: $1,295.00

Gwatney Performance

The price listed is for you sending your cylinder heads (LS3, L99, and LSA) to us for porting.

  • Intake Port Volume:  281cc
  • Exhaust Port Volume:  98cc
  • Our 281CC LS3 / L92 / L99 head was developed specifically for the stock displacement LS engine to deliver improved cylinder fill in the lower RPM ranges while adding substantial airflow increase in the upper Ranges as well.
  • Our testing has shown around 30 hp increase while improving torque below the curve

Want to learn why GPI makes the best performing Cylinder Heads you can buy!

CLICK HERE

SKU: QUALGPILS3HEAD-1 Category: Brand:
Description

Track tested.  Dyno proven.

We recently updated our LS3 head porting program for a larger 281cc intake port volume – the same cylinder read on GPI’s Ryan Steven’s record-setting 5th Gen Camaro!

Our 281CC LS3 / L92 / L99 head was developed specifically for the stock displacement LS engine to deliver improved cylinder fill in the lower RPM ranges while adding substantial airflow increase in the upper Ranges as well. Our testing has shown over 30 hp increase while improving torque below the curve.

Dyno:
On a 2010 SS that was cammed with supporting bolt ons, torque converter, and drag wheel setup; We picked up over 25 rwhp/rwtq and ET’s at the track dropped 2 to 3 tenths!

Track results never lie!

Note: The below results are from our previous 268cc cylinder heads, awaiting dyno results of the new 281cc program!

Intake Port Volume:  281cc

Exhaust Port Volume:  98cc

Lift  Intake Flow @ 28″  Exhaust Flow @ 28″ w/ No Pipe
.300 255 154
.400 308 190
.500 343 227
.600 366 260
.700 383 266
.800 391 268
Reviews (0)

Reviews

There are no reviews yet

Add a review
You must be logged in to post a review Log In
Questions & Answers (3)

Customer questions & answers

    I am in Texas, getting a 416 built , will be using NOS, what heads u recommend for my build . Using a base block, and how soon can I ship?
  1. Q I am in Texas, getting a 416 built , will be using NOS, what heads u recommend for my build . Usi...... Read more answer now
    Asked by Shawn Bytd on March 24, 2022 8:23 am
    A We can port your stock castings or you can run an edelbrock, brodix, or cid casting but they'll be around 3500-5000
    2. Howdy, I'm curious if you sell or know someone that sells good CAD models that are ready to drive on the CNC for stock LS 823 castings. We're looking to do some basic port work but I'm having a hard time locating any CAD models. Thanks Tony
  2. Q Howdy, I'm curious if you sell or know someone that sells good CAD models that are ready to drive...... Read more answer now
    Asked by tony on February 1, 2021 10:17 am
    A I appreciate you checking with us. I do not know where you can find the CAD program you need. Ours is something that is proprietary to our company.
    3. Hello quick question, about how long does the porting service take ??
  3. Q Hello quick question, about how long does the porting service take ?? answer now
    Asked by Christian Aguilar on January 6, 2021 1:52 am
    A We are about 3 weeks out at the moment

Send me a notification for each new answer.
 
SHARE YOUR CART