All of our grinds utilize the vastly superior 8620 Induction Hardened Billet Steel cores found in all forms of serious competition. Additionally, all of our Billet core custom grinds are automatically upgraded to a premium EverWear distributor/pump drive gear. Not only is the EverWear gear precision machined to significantly tighter tolerances, it is also case hardened with a proprietary nitriding process. Compared to commonly available cams ground on the cheaper cast cores, these features translate into improved reliability. This is especially true where heavy weight oils, higher volume/pressure pumps, and various aftermarket distributor gears are used.

Click HERE for a photo comparing the average cast core vs. our premium offering.

Our kits include genuine CompCams hardened steel spring locators (also referred to as "bases/spring seats") and a new set of steel-jacketed Viton seals. Often, the PAC1218 ovate wire beehive springs are used on the factory LT1 spring locators. While this setup may "work," the components simply do not fit together properly. This is typically done for cost reasons and to avoid removing and replacing the valve stem seals. As added insurance, we include the proper hardened locator, new seals, and a seal installation tool.

Proper Lobe Selection - Our absolute most important design criterion is that these kits run reliably for many thosands of miles. The grinds listed utilize the latest in lobe design technology to produce the best performance for your application. However, none of these grinds are so aggressive as to significantly sacrifice longevity and reliability for that last few hp. Setup and adjusted properly, these kits will also retain control of the valve well beyond their peak power RPM. This safety margin can provide the ability to avoid that last shift before the traps, or give you 400-700 RPM of headroom to prevent catastrophic failure in the event of an over-rev. More aggressive grinds for competition or special applications are available upon request.


Our Complete LT1 Kit includes the following components:

Any of our Ai Billet steel cam grinds listed below

PAC Racing 1218 Ovate-wire Beehive Springs

CompCams ChromeMoly Steel Retainers

CompCams 10-Deg Steel Locks/Keepers

CompCams Hardened Steel Spring Locators

OEM Quality Steel Jacketed Viton Seals

K-Line Valve Seal Installation Driver

ARP 7/16" Pro Series Rocker Studs

CompCams 7702 Pushrod Length Checking Tool

CompCams 1305 Pro-Magnum Rocker Arms - 1.6 Ratio

Ai Hardened & Black Oxided Steel Guideplates

Ai 4130 One Piece ChromeMoly Hardened Pushrods 5/16" x 7.XX" .080" Wall

Fel-Pro Gasket Kit - Timing Cover gasket, Water Pump gaskets, and Crank/Opti/Pump drive Seals

Fel-Pro 1284 Intake Manifold Gaskets w/ RTV.

Cost - $1195

Add a GM Performance Parts High-Performance Lifter Kit - $240
Includes New GMPP HR Lifters, "Dogbones," "Spider," and hardware.

Ai Billet Hydraulic Roller LT1 Grinds:

Ai 208 / 226 - .525/.540 - 112 LSA Primary Operating Range: 1500-5800rpm
This is an excellent daily cam for heavy automatic cars. Mild idle, excellent drivability, and strong low end through mid-range with peak power at approximately 5800rpm. Properly tuned w/ supporting modifications, M6's typically produce 320-330rwhp SAE corrected.

Ai 218 / 226 - .540/.540 - 112 LSA Primary Operating Range: 1800-6000rpm
This is our version of the venerable LT4 Hotcam. Noticable idle, good drivability, and strong mid-range with peak power at approximately 6000rpm. Properly tuned w/ supporting modifications, M6's typically produce 335-345rwhp SAE corrected.

Ai 226 / 234 - .540/.575 - 110 LSA Primary Operating Range: 2000-6200rpm
This is our largest stock long-block cam for auto cars. Lopey idle, good drivability, and excellent mid-range with peak power at approximately 6200rpm. Properly tuned w/ supporting modifications, M6's typically produce 345-360rwhp SAE corrected.

Ai 230 / 238 - .575/.575 - 110 LSA Primary Operating Range: 2300-6400rpm
This is our largest stock long-block cam for M6 cars. Excellent for rebuilds with 11:1 compression. Lopey idle, good drivability with gears & tuning, and excellent mid-range with peak power at approximately 6300rpm. Properly tuned w/ supporting modifications, M6's typically produce 350-365rwhp SAE corrected.

Ai 234 / 242 - .575/.580 - 110 LSA Primary Operating Range: 2500-6600rpm
This grind is best suited to 383 rebuilds with 11.0-12.0 compression. Lopey idle, fair drivability with gears & tuning. It produces excellent mid-range and top-end with peak power at approximately 6500rpm. Ideal for budget street/strip 383 rebuilds with 3.73+ gears and 2800rpm+ converters.



Note: All lifts are calculated based on a 1.6 ratio rocker, not the stock 1.5 ratio. "Supporting Modifications" implies at a minimum that your vehicle has an improved intake system along with headers and a catback exhaust system. Projected dyno output is based on stock GM LT1 long-blocks in good running order with proper tuning and adjustment. Additional displacement, compression, and airflow will all significantly increase output with these valvetrain kits.




How do the Ai cams compare to the popular grinds online?

GM LT4 Hotcam 218 / 228 - .525/.525 - 112 LSA Ground by Crane for GM
If our higher-end cam kits are a little more than you can spend, the GM LT4 hotcam kit is hard to beat. It sacrifices some power to retain reliability with the entry level valvetrain components it includes. Our 208/226 cam will typically match or better it's output, and our 218/226 grind will typically make another 15hp/lb-ft over the LT4 Hotcam with slightly better drivability.

GM "847" 234 / 242 - .574/.595 - 112 LSA Ground by Crane for GM
The GM "847" cam has successfully been run by many for years. While it typically makes high rpm power, the low-mid rpm range suffers compared to smaller grinds which negatively affects drivability. For similar top-end power without sacrificing drivability, we would suggest our 226/234 grind. Manual cars with 4.10 gears may step up to the 230/238 grind.

Comp CC305 220 / 230 - .544/.544 - 114 LSA CompCams Lobe #'s - Intake: 3109 Exhaust: 3112
The Comp Cams CC305 is one of the common small grinds commonly available online. It utilizes the older technology "Magnum" series of lobes from Comp. With proper associated components they are typically reliable, as the older Magnum series was designed for heavier valvetrain components. If you are looking for a cam in this size range, we would suggest our 218/226 grind for automatic cars, or our 226/234 grind for manual cars.

Comp CC306 230 / 244 - .544/.576 - 112 LSA CompCams Lobe #'s - Intake: 3112 Exhaust: 3150
The Comp Cams CC306 is the CC305's larger brother. It also utilizes the older technology "Magnum" series of lobes from Comp. With proper associated components they are typically reliable, but there are significant drivability trade-offs. If you are looking for a cam that will make more power than the CC306 and retain excellent drivability we suggest our 226/234 grind. Manual cars with 4.10 gears can step up to the 230/238 grind for yet another few hp in the 5000-6400rpm range.

Comp CC503 224 / 230 - .536/.544 - 112 LSA CompCams Lobe #'s - Intake: 3314 Exhaust: 3315
The Comp Cams CC503 is one of the most common newer grinds utilizing Comp's original Xtreme Energy series lobes. The more aggressive XE series lobes require quality valvetrain components to retain reliability. Our 218/226 will typically match it's output & our 226/234 will exhibit comparable drivability with another 10-15hp.

Comp 224 / 230 HL - .605/.598 - 107 LSA CompCams Lobe #'s - Intake: 3192 Exhaust: 3111
In recent years, some self-proclaimed "valvetrain gurus" online have aggressively marketed cams utilizing lobes from one of Comp's most aggressive lines - the "3100" Xtreme Energy Series. While they will typically run well initially, the irresponsible mis-application of these lobes tend to quickly fatigue even the new ovate beehive springs in only a few thousand miles. As the spring loses both load and rate loss of valvetrain stability occurs lower and lower in the RPM range. Typical symptoms are loss of power & "missing" above 6000rpm. Left unaddressed, this ultimately leads to spring failure or piston to valve contact. For comparable output without sacrificing longevity, we would recommend either our 226/234 or 230/238 grinds.