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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 |
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4 reviews for GPI / CID – Track Attack LT1 / LT4 Cylinder Heads Package
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Questions & Answers (21)
Customer questions & answers
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What are the expected power gains from these heads to ported stock heads running the ss3 cam?
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Q What are the expected power gains from these heads to ported stock heads running the ss3 cam? answer nowAsked by on November 25, 2023 2:24 pmA Around 20 rwhp
hello im looking to purchase the GPI / CID – Track Attack LT1 / LT4 Cylinder Heads Package for my Gen6 camaro ss. I have the SS2 cam with the btr sk007 spring kit. Can i use existing intake & exhaust valves for these heads? Will that cam be worth it with these heads or should i get bigger cam? Thanks.
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Q hello im looking to purchase the GPI / CID – Track Attack LT1 / LT4 Cylinder Heads Package for my...... Read more answer nowAsked by on November 1, 2023 1:23 pmA Email us at [email protected] so we can better assist you
Would these outperform my stock ported heads if I wanted to still rock with the stock cam? Or are these heads more for aftermarket cams?
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Q Would these outperform my stock ported heads if I wanted to still rock with the stock cam? Or are...... Read more answer nowAsked by on August 8, 2023 9:19 amA They would work for either but are more beneficial for a cammed car vs a stock cam
Hey there looking for a set of bare CID track attack heads for NA. I am using them on a daily driver with a btr 225 cam. I have a set of stock lt1 intake an exhaust valves new that i want to use and a set of the btr 660 springs as well. Wondering if you have a set in stock and how fast they could be ready to go?
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Q Hey there looking for a set of bare CID track attack heads for NA. I am using them on a daily dri...... Read more answer nowAsked by on June 22, 2023 7:53 amA They're all made to order typically around 6 weeks depending on backlogs
If I wanted to run a btr 230 cam with these heads would I need to flycut the stock pistons? I'm aiming for 12:1 - 12.2:1 CR for 93 octane. What milling option would get me there?
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Q If I wanted to run a btr 230 cam with these heads would I need to flycut the stock pistons? I'm a...... Read more answer nowAsked by on June 2, 2023 11:34 pmA I can't tell you for certain if you would need to flycut or not with other manufacturers cams but if you do no milling on the heads and run them at 55cc chambers where they start at you'll be over that compression level depending on if you have valve reliefs cut and what that amount may be and where the piston is located in the hole
Any oversized valve options for 427 builds ?
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A Not currently but will be offering in near future
what's the difference between these heads and having stock heads milled .040? I want to run the LT nfc camshaft can i use this cam with these heads with a 7.8 or 7.75 pushrod and it be safe?
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Q what's the difference between these heads and having stock heads milled .040? I want to run the L...... Read more answer nowAsked by on April 20, 2023 11:17 pmA These heads start at a 55cc chamber vs stock is 59cc so you wouldn't have to flycut with the majority of our other cams if you were trying to target around 12.2:1 compression, so if you were wanting to run this head with our lt nfc you'd have to have the chamber finished to 51cc and run stock head gasket. You'll need to verify preload on lifters to know for certain what length pushrod needed for your application but typically 7.850 - whatever material you removed from head and/or gasket, in this case if you do the cid heads and remove 4cc's from the chamber ( 4 x .006 = .024 ) you would run a 7.825. Hope this makes sense but if you have more questions email us at [email protected]
Do the CID heads ship fully assembled or do they ship as a kit?
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Q Do the CID heads ship fully assembled or do they ship as a kit? answer nowAsked by on January 24, 2023 8:15 amA Theres an option for spring set up and assembly for $75
Will the 55cc combustion chamber CID's allow me to run an ss3 cam, while effectively upping compression a tad over stock heads without having to mill or flycut?
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Q Will the 55cc combustion chamber CID's allow me to run an ss3 cam, while effectively upping compr...... Read more answer nowAsked by on August 20, 2022 3:04 pmA Yes but it's always good to measure for proper piston to valve clearance to be certain
Hi, I noticed in one of the preceding questions that the arp bolts are not compatible with these heads. Will they work if used with the correct washers? Will OEM bolts work?
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Q Hi, I noticed in one of the preceding questions that the arp bolts are not compatible with these ...... Read more answer nowAsked by on August 10, 2022 8:34 amA No they will not you have to use arp head studs
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Beautiful heads
Shipping was fast! Haven’t installed the parts yet but the service so far from GPI has been absolutely wonderful.
Great product worth the money
Love em