4 bolt turbo headers?

[aquickv6]

Who makes or made (if their out of business) the best set of headers for a 4 bolt turbo? Will this work with a 3.5" THDP or is a custom DP needed?
Thanks

 

[suicide six]

ATR used to make 4 bolters.

 

[suicide six]

Arizona GN may be able to help you also.

 

[REDS HOT AIR]

I believe Nick is doing some 4 bolt versions

check with him ... heres his site

http://www.arizonagn.net/

 

[suicide six]

TA performance might,not sure about Postons.

 

[aquickv6]

What's the difference between the AZGN headers and TA Performance?

Are these about the same as the old ATR headers?

 

[Nick Micale]

What's the difference between the AZGN headers and TA Performance?

Are these about the same as the old ATR headers?

There is no difference between TA and AZGN headers, they are the same. TA and I worked together in the design, testing and manufacturing of these headers.

They are the result of over 3 years work and testing, and in no way are they similar to ATR's headers.

My 4 bolt protype header is now at the fabricators and should be available soon. They are also seting up to build a 3" and 3-1/2" downpipe with the integral wastegate, as well as versions for external wastegate