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Customers

Barbara H.

John, Thanks again for making Colton's dream come true! The truck is in the body shop, the cowl hood arrived and the new 408 engine you built is...
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Brian R.

John!! Got my Viper back together, dyno tuned. Super happy with the results of your work!! Gained 112 RWHP and 107RWTQ!!!!! More at the crank. Sounds...
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Robert M.

John, Thank you for all you have done, From your previous email responses, you seem to be old school, a man of his word. Thanks again John for...
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Mitch C.

Awesome work! Glad I went with you guys! Anyone I know of that wants to build I'll send your way! Thanks John! Your the man!! Mitch
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Ricky H.

Ricky H.

Thanks for everything John. The headers are great !
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Derek B.

Derek B.

Great Personalized service. Derek
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Mike M.

John's very honest, something that's hard to find these days. This means he'll tell you the truth and you may not want to hear it. LOL. The best...
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Shaine D.

Wow! Thank you for that quick and informative response. Must be why you are always recommended. Shaine
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Steve F.

Thank You for all your help and hookups with the parts - sounds like a lot of people appreciate it, I'm one of those people. - Steve
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Craig W.

Craig W.

Thanks John, So far 8 races and 8 top Five!!
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James G.

James G.

5.80 in 1/4 mile @ 244 mph & 3.76 @ 197 in the 1/8 mile
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Andrew R.

Andrew R.

I am very pleased with the quality of the magnum deep pan, and the best part is that it really is not much deeper than the stock pan so I dont have...
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Don S.

John, I can't emphasize this enough, but without the help you're getting me I could not have afforded my dream engine! I literally have cringed when...
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Ryan

bought numerous things and all transactions went very smooth. Responded to emails within a day or less. Ryan
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Steve V.

Steve V.

You are the only guy who I trust to do the most important thing I'll ever do to my Roadrunner, a car that means more to me than any inanimate object...
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Bruce P.

Bruce P.

You’ve got a big fan in me. Oh yeah, the car is awesome. Runs like a raped ape. So thanks a lot !
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Phil S.

Phil S.

Great job creating this Dakota R/T Ground Affects Kit. Phil
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Henry T.

Henry T.

HEY! Everything is installed and car runs AWESOME! Thanks for everything, Thanks again. Henry 2000 Dodge Viper R/T 10
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Rob D.

John is a real awesome guy. i couldn't thank u enough for all the help over 7-8 years.
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Kayden G.

Kayden G.

Well your service is amazing. Never had better from any company I've ordered from! Kayden
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Bruce P.

Bruce P.

John, you have been so prompt and helpful. Take care my friend and thanks again. I'll be back. Bruce
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Marko T.

Marko T.

Hi John! Thanks again for the great service! Marko T. Finland
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Ian A.

Ian A.

I wanted to thank you for all your help and support, for being so patient and for being a good, honest person and especially so professional....
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Bob F.

Bob F.

Plymouth 426 Hemi
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Ricky R.

Ricky R.

1937 Chevy Legends Race Car, Thanks for everything!
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4:56 Ring and Pinion Info

CHRYSLER

PROBLEM: CHRYSLER: 9.25", 12 Bolt Cover, 4.56 and Higher.
I bought 4.56 gears for my 1/2 ton pickup, but I cannot get the cross pin into my carrier.
SOLUTION: It does not matter whose gears you use. You will need to modify your cross pin to use a 4.56 or higher gear in your vehicle. This applies for open differential, Auburn and Eaton differentials. The pin will need to be cut at an angle opposite the bolt hole. Most do this on a grinder to slightly flatten one side of the pin making clearanace to the ring teeth allowing the pin to slide in. Because every manufacturer is different, no measurement is provided.

FORD

PROBLEM: FORD: 7.5", 10 Bolt
I bought 4.56 gears for my early fox body (pre-1986) and I cannot get the cross pin into the carrier.
SOLUTION: It does not matter whose gears you use. You will need to modify your cross pin to use a 4.56 or higher gear in your vehicle. This applies for open differential, Auburn and Eaton differentials. The pin will need to be cut at an angle opposite the bolt hole. Because every manufacturer is different, no measurement is provided.

GENERAL MOTORS

PROBLEM: GM: 7.5"/7.6", Bolt Differential, 4.56 and Higher.
I bought 4.56 gears for my F-Body and I cannot get the cross pin into the carrier.
SOLUTION: It does not matter whose gears you use. You will need to modify your cross pin to use a 4.56 or higher gear in your vehicle. This applies for open differential, Auburn, Eaton, and Gov lock differentials*. The pin will need to be cut at an angle opposite the bolt hole. Because every manufacturer is different, no measurement is provided.
* If your F-Body is a SS or WS6, you have a Torsen differential. This uses a block and paddle system that cannot be modified. However, SLP has a block and paddle kit that will allow you to use a 4.56 and numerically higher ring and pinion.




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