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Customers

Troy K.

Troy K.

Dodge Viper
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Kayden G.

Well John, your service is amazing if you want my opinion. Never had better from any company I've ordered from. Thanks, Kayden
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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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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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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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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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Matt C.

Thanks again John, someone who’s willing to help and not just sell parts. So, looks like you’ll be listed on my referrals. Keep in touch. Thanks...
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Clay B.

Clay B.

Thanks for everything !
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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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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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Buyer

Super guy to deal with! GREAT SERVICE!! GREAT PRICE!!
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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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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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Taylor M.

Taylor M.

Thanks a lot John !
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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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Dan B.

Dan B.

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

Robert S.

Great parts and service! Robert
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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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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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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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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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Jason B.

Thanks John.. you have been awesome to work with and I am REALLY looking forward to driving my SRT-10 again :) Jason
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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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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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