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Customers

Robert S.

Robert S.

426 Hemi Cuda
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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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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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Harold R.

John, Thanks for the great customer service! Harold
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Ossi L.

you come highly recommended to me by Finnish racers!
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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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Bob F.

Bob F.

Plymouth 426 Hemi
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Toby W.

John, Thanks again so much. You're truly awesome.
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Phil S.

Phil S.

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

Thanks for all, Your shop is very highly recommended by a lot of Dakota/Durango owners up here in Canada.
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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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Derek B.

Derek B.

Great Personalized service. Derek
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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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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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Billy W.

Billy W.

Dakota R/T 408
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Ricky R.

Ricky R.

1937 Chevy Legends Race Car, Thanks for everything!
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William K.

You do outstanding work man. My whole crew is ready to see your work in action ;-)
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Steve B.

Steve B.

Thanks for the help with my 426 stroker.
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Michael D.

I just wish there were more guys like you around for us gen3 guys. Most just want a sale and don't care to actually help let alone give advice or...
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Robert A.

Dude you are badass, no one and I mean one has made me feel better about getting work done then you and I appreciate that. thanks a million
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Gary H.

Gary H.

John, Thanks a lot !
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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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David C.

Southeastern Performance has my vote. Thanks again!
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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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Craig W.

Craig W.

Thanks John, So far 8 races and 8 top Five!!
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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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