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Customers

Craig W.

Craig W.

Thanks John, So far 8 races and 8 top Five!!
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Phil S.

Phil S.

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

Billy W.

Dakota R/T 408
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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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Robbie C.

Robbie C.

Great job all round !
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Ossi L.

you come highly recommended to me by Finnish racers!
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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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Buyer

Super guy to deal with! GREAT SERVICE!! GREAT PRICE!!
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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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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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David C.

Southeastern Performance has my vote. Thanks again!
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Harold R.

John, Thanks for the great customer service! Harold
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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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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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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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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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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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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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Ricky J.

Thanks for all the info, you have been a great help and a credit to your company.
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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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Maurice

Maurice

Maurice 73 Dodge Dart
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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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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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Doug B.

Doug B.

My experience with Southeast Performance and John has been amazing. My Viper has gained another 200hp and drives fabulous. Thanks for everything!
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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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Buick GN1 Aluminum Cylinder Heads

From the all out competitor to the performance street enthusiast the GN1 aluminum head is the preferred choice. In 1990 we had a goal. Produce an aluminum cylinder head for the Buick V-6 turbo that was superior in both performance and affordability than anything on the market. In 2002 more than a decade after establishing this goal the Champion GN1 head has achieved this many times over. With hundreds of heads in service the GN1 head is a proven winner. The GN1 head is precision cast from 356-T6 Aluminum Alloy. The aluminum castings are machined in our facility on a state of the art CNC machining center. This provides us with complete control of the quality and machine scheduling to assure the finest quality product possible and to have product in stock at all times. Custom-built machining fixtures allow the majority of machined elements to be completed in one setup thus maximizing the accuracy and consistency of their location. Research and development is another key element in Southeast Performance on going commitment to a product that leads the competition. After extensive testing, changes that are found to enhance the performance of the GN1 head can be incorporated into the product almost immediately. The in house R&D and manufacturing teams work together to bring new innovative ideas to market as soon as possible. Special Machining Features Include: •CNC machined 46cc combustion chambers for consistent volume and shape. •Precision mill bored valve guide bores provide fine surface finish for optimum heat transfer. •Radii on head bolt spot faces to reduce stress risers that can lead to cracking. •Thread milled spark plug ports assure consistent precision fit to plugs. •Precision milled finish on all gasket surfaces. •CNC contour machined multi angle valve seats provide superior geometry, roundness, and surface finish. Key design features for the GN1 heads: •Valves are moved closer to cylinder bore centerline to unshroud valves for more flow. •Spark plugs are moved closer to cylinder bore center for improved combustion •Special combustion chamber shape for maximum efficiency. •Large 1.900" intake and 1.600" exhaust valves. •High flow as cast intake and exhaust ports. •Accepts stock rocker arms and stock valve covers. •Lightweight compared to cast iron head. GN1 aluminum heads will accommodate stage I or stage II blocks and three different rocker arm configurations. They are available as complete assembled units or fully machined bare castings. On the track or the street the Southeast Performance GN1 Aluminum head for the turbo V-6 is an excellent choice.




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