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  |_ Camshaft Thrust Buttons->
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    |_ Brodix
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    |_ Koffel's Place
    |_ Mopar Performance
    |_ Pro-Filer Cylinder Heads
    |_ Sidewinder Mopar Cylinder Heads
    |_ Stage V Cylinder Heads
    |_ Trick Flow Cylinder Heads
    |_ World
  |_ Dodge SRT4 Turbo->
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  |_ Engine Girdles->
  |_ HEMI 5.7L, 6.1L, 6.4L Components->
  |_ Intake Manifolds->
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Striker Viper heads Return
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Tech Help
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Viper
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Customers

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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Taylor M.

Taylor M.

Thanks a lot John !
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Troy K.

Troy K.

Thanks for all your great help with my Viper.
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Kris L.

John, Sitting in the car with a big smile on my face. Thanks for the quality brand products and the great price. Cheers Kris
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David P.

David P.

Thanks for the brake lines !
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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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Steve B.

Steve B.

Thanks for the help with my 426 stroker.
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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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Toby W.

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

Benny C.

Thanks for the Great Mopar Service !
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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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David A.

David A.

Thanks for everything, David
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Brian A.

Brian A.

The 408 engine runs strong, put on dyno 405hp with 415tq N/A not shabby.. also was on 22" wheels with those numbers est. 500-525 @ crank. Thanks so...
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Craig W.

Craig W.

Thanks John, So far 8 races and 8 top Five!!
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Brian C.

Brian C.

I have never had any problems with John on any transaction. One of the few vendors I have never had a single problem with. Including paying overnight...
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Gary H.

Gary H.

John, Thanks a lot !
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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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Michael W.

Michael W.

After getting all the compatible stuff shes a beast! Michael
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Clay B.

Clay B.

Thanks for everything !
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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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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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Carl E.

Carl E.

Dodge SRT-10 Viper
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Alan P.

First off, I just have to say that I have never came across a more stand-up guy that takes his time to connect with his customers and have the...
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Hannu O.

Hannu O.

thank you very much from Finland!
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World Products

This is the cylinder head that highly respected drag racers like Scotty Richardson employ to win NHRA National event titles and literally hundreds of thousands of dollars in high stakes ET Bracket Races. Merlin III is a true high performance head, capable of supporting in excess of 800 HP out of the box. Take your pick between 310cc or 350cc intake runners. Assemblies include premium quality Manley RaceMaster or Severe Duty valves.

World Products offers heads in both aluminum and cast iron. For street engines, We recommend cast iron heads over aluminum. "Iron is better where weight or looks are not a factor because it retains heat better than aluminum and keeps the heat in the combustion chamber, which is where you want it. Cast iron heads will typically give you about 10 to 15 more horsepower than an identical set of aluminum heads on a street engine. As for the weight difference, a pair of cast iron small block Chevy heads weighs about 30 lbs. more than a set of aluminum heads. On a big block Chevy, the weight difference is about 85 lbs., which doesn't make much difference on a crew cab truck or RV, but does in a race car. For racing, you want the lighter aluminum heads."





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