hi folks.

wonder can anyone help me,i have a comptech 4-2-1 header on my ek4 which is same spec as the US civic SI.

the header is great esp for a 2.25 collector and very happy with it,im doing a b18 bottom end build on my b16a2 so am in right in saying this manifold wont fit when i put the b18 bottom end on? (7mm difference than b16 block)

i know comptech listed headers for the integra gsr etc but just wondering did they alter the length of them or are they all same spec?

just thought i would post this up as it might save me time taking it off and double checking
on my friends ek9 as that has "destroked" b18 block as standard.

thankyou.