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Customers

Ossi L.

you come highly recommended to me by Finnish racers!
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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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Troy K.

Troy K.

Thanks for all your great help with my Viper.
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Phil S.

Phil S.

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

Southeastern Performance has my vote. Thanks again!
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David P.

David P.

Thanks for the brake lines !
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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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Toby W.

John, Thanks again so much. You're truly awesome.
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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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Taylor M.

Taylor M.

Thanks a lot John !
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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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Andrew R.

Andrew R.

I am very pleased with the quality of the magnum deep pan, and the best part is that it really is not much deeper than the stock pan so I dont have...
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Kyle M.

Kyle M.

John, I am very pleased with the brake conversion. The kit was very easy to install and I didn't have any problems and look very good as...
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Buyer

Super guy to deal with! GREAT SERVICE!! GREAT PRICE!!
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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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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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Bruce P.

Bruce P.

You’ve got a big fan in me. Oh yeah, the car is awesome. Runs like a raped ape. So thanks a lot !
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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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Kayden G.

Kayden G.

Well your service is amazing. Never had better from any company I've ordered from! Kayden
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Carl E.

Carl E.

Dodge SRT-10 Viper
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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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Derek B.

Derek B.

Great Personalized service. Derek
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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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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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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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