i am going to purchase the t1r header but i see sites that list it as the t1r response header, and another as the t1r power header both show it as 48mm primaries and 55secondaries with 65mm collector. whats the newer one, or better one. also any dyno numbers out yet. i know its similiar to the j's.

http://www.vexmotorsports.com/T1R-Re...er_p_1322.html

http://www.evasivemotorsports.com/Me...&Store_Code=EM

http://www.speedstar.ca/main_T1R_exhaust.htm

also this site is showing a different header notice how the secondaries meet the collector.

 

http://www.typeoneracing.com/catalog...&cat=81&page=1
https://www.aj-racing.com/shop/produ...5&cat=0&page=1

I believe it was re-designed from what I've read. Just search and read everything you can. I even found a better price for you on A-J racings site.

 

so nooone has this header on their car or any dyno numbers for its gains?