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  |_ AGP Turbo and Accessories
  |_ HEMI 5.7L,6.1L TwinTurbo Kits
  |_ Turbo Accessories->
  |_ Turbo Blow Off Valves->
    |_ Apexi Blow Off Valves
    |_ Blitz Blow Off Valves
    |_ Greddy Blow Off Valves
    |_ HKS Blow Off Valves
    |_ Perrin Blow Off Valves
    |_ Turbo XS Blow Off Valves
    |_ Turbonetics Blow Off Valves
    |_ Vortech Blow Off Valves
  |_ Turbo Intercoolers->
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  |_ Turbochargers->
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Customers

Buyer

Super guy to deal with! GREAT SERVICE!! GREAT PRICE!!
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Bob F.

Bob F.

Plymouth 426 Hemi
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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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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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David A.

David A.

Thanks for everything, David
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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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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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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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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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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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Carl E.

Carl E.

Dodge SRT-10 Viper
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Phil S.

Phil S.

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

Craig W.

Thanks John, So far 8 races and 8 top Five!!
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Michael W.

Michael W.

After getting all the compatible stuff shes a beast! Michael
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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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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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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 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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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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Robert S.

Robert S.

426 Hemi Cuda
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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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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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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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Apexi Blow Off Valves and Accessories

APEXI TWIN CHAMBER BLOW OFF VALVE

High-flow blow off valve

Compatible with a wide range of applications, from stock to high boost setups. Attractive finish.

A good blow off valve is an absolute necessity for high performance turbo systems. A well-engineered blow off valve prevents turbine damage by quickly relieving excess boost pressure without sacrificing boost response. Conventional blow off valve designs require choosing between flow capacity and boost response - blow off valves with high flow capacity generally have poor boost response, while blow off valves with good boost response are not able to handle high flow capacity. A'PEX engineers have developed a solution to this dilemma by creating the Twin Chamber Blow Off Valve.

The Twin Chamber Blow Off Valve is an adjustable, high-response unit for use on a wide range of applications. Rather than relying on the vacuum chamber alone, the Twin Chamber Blow Off Valve harnesses boost pressure in a second chamber to assist in opening the relief valve. This design allows the use of a unique flat-valve design, which provides excellent valve response under both low and high boost conditions without sacrificing flow capacity. Valve reaction is adjusted by tightening or loosening the spring tensioning screw on top of the unit. Blow off sound can be adjusted by turning the red collar at the base of the unit. With its innovative design and adjustment features, the Twin Chamber Blow Off Valve is flexible enough for use on street cars as well as race cars.





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