GPI / CID – Track Attack LT1 / LT4 Cylinder Heads Package
Varies Based on Options
REQUIRES THE USE OF ARP HEAD STUDS
| LIFT | FLOW |
| 0.300 | 227 |
| 0.400 | 291 |
| 0.500 | 328 |
| 0.600 | 336 |
| 0.700 | 346 |
| 0.800 | 354 |
Frequently Purchased Together
Camshafts & Valvetrain
Brian Tooley Racing – Spring Locators for Bronze Guides .060″ Thick (SL565060-16)
$29.00
Description
Questions & Answers (34)
Customer questions & answers
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Couple questions these heads are drilled for the LT one and LT four intake. Do I have to plug the other holes the ones I’m not using if so, what do I need for a set screws to plug them? My other question are these six bolt heads? I’m running them on an LTR6. Bolt block. Thank you
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Q Couple questions these heads are drilled for the LT one and LT four intake. Do I have to plug the...... Read more answer nowAsked by on June 24, 2026 11:45 amA These are 6 bolt heads, they have both lt1 and lt4 bolt pattern, and I'm not sure on the measurements for the threads but a pipe plug could be used or rtv to block off the other remaining bolt holes
How much compression would I be at if milled to 48cc, a .40 head gasket with track attack cam and if all parts are in stock how long does shipping take once milled and assembled ?
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Q How much compression would I be at if milled to 48cc, a .40 head gasket with track attack cam and...... Read more answer nowAsked by on April 28, 2026 12:29 amA Sorry I forgot to put my goal of compression I’m aiming for 14:1-15:1 for track attack cam, this setup will be your alls gpi pistons and rods packageA You should be around 14.8:1 and heads are made to order depending on parts availability around 4-6 weeks
So for the track attack heads what em I suppose to get it says option on intake valve /exhaust valve section /spring kit/head studs/spring locator/ls9 retainer for ti valves/ head bolt slasher /spring setup and assembly And I have a LT1 6th gen camero and my cam ratio 227/242 .646"/.631" 112 LSA, 109.5 ICL w/ +32% Fuel Lobe PAC Dual Polished Racing Valve Springs BTR Chromoly Pushrods DOD Delete Kit Morel 7717 Race Lifters DOD Plugs If you can plz help me to pick the right stuff for the heads that would be great
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Q So for the track attack heads what em I suppose to get it says option on intake valve /exhaust va...... Read more answer nowAsked by on January 15, 2026 7:20 pmA Email us at support@gwatneyperformance.com so we can better assist you
Which valve guides do the track attack 62cc heads come with. I'm about to order them but I want to make sure they come with the bronze valve guides.
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Q Which valve guides do the track attack 62cc heads come with. I'm about to order them but I want t...... Read more answer nowAsked by on December 8, 2025 11:33 amA The come with bronze guides
I have a 2022 lt1 Camaro, I want to make a 1000 hp. My plan is to do the build in three steps. First step I’m thinking heads, cam, intake, exhaust and throttle body. Second step 416 short block. Third step pro charge and fuel system. Is this doable, or should I do the 416 first? What part combinations do you recommend? This car is just a toy not a daily. It might see the drgstrip a couple times a year.
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Q I have a 2022 lt1 Camaro, I want to make a 1000 hp. My plan is to do the build in three steps. Fi...... Read more answer nowAsked by on October 5, 2025 10:46 amA Email us at support@gwatneyperformance.com so we can better assist you
Hello, How long generally the GPI ported LT1/LT4 CDI cylinder heads for FI takes to be shipped out?
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Q Hello, How long generally the GPI ported LT1/LT4 CDI cylinder heads for FI takes to be shipped out? answer nowAsked by on July 1, 2025 8:36 amA Typically around 6 weeks depending on on casting and valvetrain parts availability
If I wanted to run the track attack cam what is the recommended milling that should be done?
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Q If I wanted to run the track attack cam what is the recommended milling that should be done? answer nowAsked by on May 20, 2025 8:29 pmA Ideally for the track attack cam you'll want to be between 13-14:1 compression. There are a couple of other variables involved to achieve those numbers. Please reach out to us at support@gwatneyperformance.com so we can ensure you're getting the correct stuff for your set up.
What bronze valve guides do these heads use and how can I purchase replacements? Two of mine cracked after my previous setup grenaded itself.
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Q What bronze valve guides do these heads use and how can I purchase replacements? Two of mine crac...... Read more answer nowAsked by on March 9, 2025 7:19 pmA We don't sell the guides separately to my knowledge, you'd need to reach out to Kuntz and Co 870-246-2595
can I use the 62mm chambered heads on a NA setup on a stock long block. Will any milling be required?
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Q can I use the 62mm chambered heads on a NA setup on a stock long block. Will any milling be requi...... Read more answer nowAsked by on February 4, 2025 10:08 pmA It is possible to use the 62mm "Power Adder" heads on a stock LT1/LT4 long block. However, with a naturally aspirated application as you've described, this would not be advisable, as taking away compression would hurt a naturally aspirated combination. The 55cc "NA" heads would be more appropriate for the application you've described. Ultimately, each combo is different. Feel free to email me directly and we can make sure you get what's right for your combo. Andrew@gwatneyperformance.com.
I’m really wanting these heads but want the Lt nfc cam how much would it have to be cut to get. Min of 13-1 compression with a .40 gasket
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Q I’m really wanting these heads but want the Lt nfc cam how much would it have to be cut to get. M...... Read more answer nowAsked by on May 9, 2024 9:28 pmA You'll want to mill to 53cc chambers and run .040 gasket
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