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A A New Disc Brake Conversion
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A New Trick Flow Mopar Head
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  |_ Camshaft Thrust Buttons->
  |_ Camshafts->
  |_ Cylinder Heads->
    |_ Brodix
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    |_ Indy Cylinder Head
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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->
  |_ Engine Components->
  |_ Engine Girdles->
  |_ HEMI 5.7L, 6.1L, 6.4L Components->
  |_ Intake Manifolds->
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Tech Help
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Viper
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Customers

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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Robert S.

Robert S.

Great parts and service! Robert
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Billy W.

Billy W.

Dakota R/T 408
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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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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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Benny C.

Benny C.

Thanks for the Great Mopar Service !
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Hannu O.

Hannu O.

thank you very much from Finland!
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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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Dan B.

Dan B.

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

Steve B.

Thanks for the help with my 426 stroker.
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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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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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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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Harold R.

John, Thanks for the great customer service! Harold
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Darren B.

Darren B.

John,Racing flat out on the 440/533 engine over 1 season & 65 passes at 8.97@150mph 1.27 60' getting great results!!Engine is GREAT!Thanks mate!
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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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Robert S.

Robert S.

426 Hemi Cuda
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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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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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Dan F.

Dan F.

John, The truck is not done but i drive it daily and it runs good now. Eventually id like to do the rear brakes! Thanks
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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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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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Scot C.

Scot C.

Thanks for everything John. We will be doing business again. At Nationals 6.38 on a 6.54 dial in.
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Gary H.

Gary H.

John, Thanks a lot !
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Michael W.

Michael W.

After getting all the compatible stuff shes a beast! Michael
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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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