RMF header

[h22a type-s civic]

i am looking at either getting custom headers built or buying RMF headers for my H22A civic. does anyone know what size is the header tubing is on the RMF header?

[tytyguy]

i bieleve its 2.5

[h22a type-s civic]

Does anyone know the sizes of after market headers for the h22a in general? like DC sport and mugen.

[honda_racing101]

The primaries are no where near 2.5 inches. The collector is.

Was it really necessary to make 2 threads for this?

[h22a type-s civic]

yes it was.

[honda_racing101]

Originally Posted by h22a type-s civic

yes it was.

Well if you say so.

[SiGNAL748]

Smsp

[honda_racing101]

RMF ftw

[MazdaX]

Originally Posted by honda_racing101

The primaries are no where near 2.5 inches. The collector is.

Was it really necessary to make 2 threads for this?

Indeed maybe 1 5/8's at the most and the 4-1 collector would be a maximun of 2.5 because over that with a N/A set up would seriously decrease performance..I've noticed the common primary is around 1 5/8 for all kinds of USDM and JDM vehicles..weird lol.

[h22a type-s civic]

thanx

[AllmotorBB6]

Originally Posted by MazdaX

Indeed maybe 1 5/8's at the most and the 4-1 collector would be a maximun of 2.5 because over that with a N/A set up would seriously decrease performance..I've noticed the common primary is around 1 5/8 for all kinds of USDM and JDM vehicles..weird lol.

he makes 3" collectors as well.

[h22a type-s civic]

i think the 2.5 will work better for me because my exhaust is 2.5 inches

[AllmotorBB6]

Originally Posted by h22a type-s civic

i think the 2.5 will work better for me because my exhaust is 2.5 inches

i hope you are prepared to wait awhile.