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Rear End->
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Striker Viper heads Return
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Tech Help
Throttle Bodies->
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Tuning and Controllers->
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Valvetrain Components->
  |_ Guideplates->
  |_ Retainers->
  |_ Rev Kits->
  |_ Rocker Arms->
  |_ Seals->
  |_ Stud Girdle Kits->
  |_ Valve Covers->
  |_ Valve Springs->
    |_ Brodix Valve Springs
    |_ Comp Cams Springs
    |_ Crane Cams Springs
    |_ Crower Springs
    |_ Dart Valve Springs
    |_ Edelbrock Springs
    |_ Eibach Springs
    |_ Ferrea Valve Springs
    |_ 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
Water Pumps->
Wheels->
Wideband Monitoring Systems->
Wiring harness and Accessories->

Customers

Rob D.

John is a real awesome guy. i couldn't thank u enough for all the help over 7-8 years.
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Phil S.

Phil S.

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

Southeast Performance and John Mercedes have been "OUTSTANDING" to do business with. I couldn't be happier.
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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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William K.

William K.

Well your service is amazing if you want my opinion. Never had better from any company I've ordered from. William K.
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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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Derek B.

Derek B.

Great Personalized service. Derek
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Marko T.

Marko T.

Hi John! Thanks again for the great service! Marko T. Finland
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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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Pete L.

Pete L.

Mopar RB 440 Aluminum block with a Procharger. Makes 1600 HP!!
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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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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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Dan B.

Dan B.

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

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

Troy K.

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

John, Thanks for all your help. I wish I had known about you before I ordered the rest of my stuff! Thanks, Ken
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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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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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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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Robert S.

Robert S.

426 Hemi Cuda
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Daniel C.

Daniel C.

Thanks for your exemplary service. Keep doing what you're doing. Daniel C.
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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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Dart Valve Springs

Dart's in house engine R&D program and daily contact with top engine builders have taught us which springs perform correctly under the stress of competition. We offer springs for all types of engines, including Street Performance, Oval Track, Marine and Drag Racing. Call Southeast Performance for your specific application.



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