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  |_ Guideplates->
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  |_ Rocker Arms->
  |_ Seals->
  |_ Stud Girdle Kits->
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  |_ Valve Springs->
    |_ Brodix Valve Springs
    |_ Comp Cams Springs
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    |_ Ford Racing Valve Springs
    |_ GM Performance Valve Springs
    |_ Isky Springs
    |_ K-Motion Valve Springs
    |_ Lunati Valve Springs
    |_ Manley Valve Springs
    |_ Mopar Performance Valve Springs
    |_ Pioneer Valve Springs
    |_ Sealed Power Springs
    |_ World Valve Springs
  |_ Valves->
Viper
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Customers

Ricky R.

Ricky R.

1937 Chevy Legends Race Car, Thanks for everything!
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Tom R.

John--the 408 engine you built for me is outstanding. Feel free to give him my cell number and I'll happily give you a strong reference. Thank you...
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David P.

David P.

Thanks for the brake lines !
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Clay B.

Clay B.

Thanks for everything !
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Troy K.

Troy K.

Dodge Viper
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Darren B.

Darren B.

John, Thanks mate! The 440/533 stroker ran a 5.71 @ 122 mph on the eighth mile first time out with it's previous best 6.30 @ 108 mph ! Cheers
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Buyer

Super guy to deal with! GREAT SERVICE!! GREAT PRICE!!
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Dan B.

Dan B.

Dakota R/T 408, Thanks for everything! Dan https://www.youtube.com/watch?v=wZekmXKYXA4
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Bill S.

Bill S.

Thanks John, 426 Hemi stroker 588 https://www.youtube.com/watch?v=1dJdt0ZFzjU
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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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Carl E.

Carl E.

Dodge SRT-10 Viper
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Daryl S.

Your 408 runs like a dream. I think we are well over the 400hp side, a new 300hp mustang could not overcome, it is a beast. I am very happy with the...
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Toby W.

John, Thanks again so much. You're truly awesome.
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Felix C.

How awesome is this! This superb service is exactly on point w/what everyone have raved about. Thank you, Felix
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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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James G.

James G.

5.80 in 1/4 mile @ 244 mph & 3.76 @ 197 in the 1/8 mile
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Jim A.

Jim A.

Two year champion in modified tractor pulling classes named "Watch This Trick". Chrysler 426 Hemi. Thanks for the Great Service!
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Colton H.

Colton H.

"Johns the man, bought a 410 package from him years ago after I got back from overseas. The caveat I gave John was that it had to pass Californian...
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Jared B.

John, You Rock! Thanks again for the great deals and speedy service. Really appreciate it. Jared Dakota R/T
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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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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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David A.

David A.

Thanks for everything, David
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Matt G.

I just want to say thanks for all that you have done for me, because over the weekend I was the fastest R/T out there with no power-adders and still...
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Billy W.

Billy W.

Dakota R/T 408
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Bob F.

Bob F.

Plymouth 426 Hemi
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World Performance Valve Springs

Valve springs are one of the most critical and overlooked components in your engine. They must be matched to your cam in order for the engine to reach its full potential. It does absolutely no good to install a cam that will rpm to 8,000 if you do not have the correct springs. Use only the valve springs that will give the recommended spring pressure with the valve both on the seat and at maximum lift. These World Products replacement valve springs are offered in single and dual styles to meet their cam requirements.



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