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Just recieved a set of 2" primary by 3.5" Long tube headers for my Silverado from ARH , im very excited as these are my first nice set of headers ive had ,
I currently have OBX 1-3/4" long tubes that ive ran for 4 years now , they are a great budget header , but are very restrictive on my setup .
I Dynoed 627 to the wheels in 2nd gear thru an 80e/Tcase , with the OBX headers and a 3.5 exhaust / cutout , which we found out was too restrictive on my combo ( Thanks Pat - 03SierraSLT , he is one smart **** )
I put a back pressure gauge on my exhaust and even with cutout open i had 20 psi of back pressure !!!
So the fix is to make the exhaust bigger , well there are 1-7/8 long tubes out there , they would prob be fine im sure , but since im buying fresh , and making 15 psi of boost ( also consider exhaust restriction) i wanted the biggest header i could buy , so i had to call some manufactures and see what was available.
Well Steve at ARH said they would make me a set of 2" primaries with a 3.5" collector . I said Hell yes !! I want some !! And being that they make headers for my favorite car, the COPO Camaro, i was excited to get some from them, Thanks ARH !
They just came today
So now to install and fab up some 3.5" mid pipes , im excited to see what she will do now that it can breath
Im impressed with the fit and finish so far , ill report how they fit when i get them on , it takes me a while with 2 kids to get anything done Lol
Last edited by TIM Z; 11-16-2015 at 07:06 PM.
Reason: Pics added
11-16-2015, 06:20 PM
ARH 2" x3.5" Headers
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