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Customers

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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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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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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Robert S.

Robert S.

426 Hemi Cuda
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Michael W.

Michael W.

After getting all the compatible stuff shes a beast! Michael
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Craig W.

Craig W.

Thanks John, So far 8 races and 8 top Five!!
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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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Dan B.

Dan B.

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

Bob F.

Plymouth 426 Hemi
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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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Ricky R.

Ricky R.

1937 Chevy Legends Race Car, Thanks for everything!
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Ricky H.

Ricky H.

Thanks for everything John. The headers are great !
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Steve V.

Steve V.

You are the only guy who I trust to do the most important thing I'll ever do to my Roadrunner, a car that means more to me than any inanimate object...
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Shaine D.

Wow! Thank you for that quick and informative response. Must be why you are always recommended. Shaine
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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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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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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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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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Bill S.

Bill S.

Thanks John, 426 Hemi stroker 588 https://www.youtube.com/watch?v=1dJdt0ZFzjU
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Steve B.

Steve B.

Thanks for the help with my 426 stroker.
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Taylor M.

Taylor M.

Thanks a lot John !
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Phil S.

Phil S.

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

Robert S.

Great parts and service! Robert
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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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Koffel's Place 440 Engine Blocks

The specs on the K-P 440 Mopar block are:
High nickel content in casting material.
Increased material in cylinder walls; can bore to 4.600”
Reinforced main webbing.
Revised water jacket allows stroke to 5.00” + .250” raised cam available.
Steel billet 4-bolt main caps on all five bearings.
Screw-in freeze plugs. (That ends having one blow out at a bad time!)
Priority main oiling system. Longer bearing life.
Revised lifter galley area, engine builder can change lifter bore position.
Increased deck thickness, improved head gasket sealing, allows for milling
ARP main studs and 7/16 cross bolts on main caps
Accepts all standard 440 items: cam drives, water pump, oil pump, etc.
Available in 4.310 bore and 4.490 bore.


The only thing that you and your engine builder will need to do is to put the toque-plate on, final bore and hone the cylinders to fit your pistons. The blocks have been decked and align-honed with CNC equipment.


Contact Southeast Performance for availability and pricing.



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