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GPI / CID – Track Attack LT1 / LT4 Cylinder Heads Package
From: $3,237.00
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
$71.49
Camshafts & Valvetrain
Brian Tooley Racing – Spring Locators for Bronze Guides .060″ Thick (SL565060-16)
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Description
Questions & Answers (16)
Customer questions & answers
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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
Why don't the arp head bolts work with these heads if you use the smaller od washers?
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Q Why don't the arp head bolts work with these heads if you use the smaller od washers? answer nowAsked by on August 10, 2022 8:05 amA The head bolts are cast with the washer attached to the bolt and are too wide to fit down in the recess on the head whereas the stud doesn't have the shoulder
What’s the wait time also how much more whp would these heads give me 2018 camaro ss Currently FBO track attack high ram cam and stock ported mill heads
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Q What’s the wait time also how much more whp would these heads give me 2018 camaro ss Currently FB...... Read more answer nowAsked by on June 24, 2022 3:03 amA Around 6 weeks and you'll gain around 30-40 more hp
Any different hp in these track attack head that the normal port GPI head for N/A C7? Who made more hp?
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Q Any different hp in these track attack head that the normal port GPI head for N/A C7? Who made mo...... Read more answer nowAsked by on February 4, 2022 1:32 pmA The cid heads will outperform the ported stock castings
What is the difference in the Lt1/L83/L86 sk007 btr springs and the Lt4 btr sk008 springs?
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Q What is the difference in the Lt1/L83/L86 sk007 btr springs and the Lt4 btr sk008 springs? answer nowAsked by on August 25, 2021 11:04 pmA You'll need the sk008 springs for the lt4 intake valves
I understand these would be good for N/A. How well would these do on boost versus porting stock heads?
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Q I understand these would be good for N/A. How well would these do on boost versus porting stock h...... Read more answer nowAsked by on June 28, 2021 1:29 amA We have a blower port design developed for these that works much better than stock
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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