I'm putting together a spreadsheet, which I will post as a webpage and link here when completed, comparing all the SOHC aftermarket headers available. What I'm looking for at this point is primary and collector inner and/or outer diameter measurements for the Stillen 4-1, Landspeed Racing Powercore 4-2-1, DC Sports 4-2-1 and 4-1 one-piece, Greddy 4-2-1 two-piece, APEXi 4-2-1 one-piece, and Comptech 4-2-1 one-piece.

I have this data for all the other SOHC headers I know of, but any info you can provide on the ones I've listed above would be greatly appreciated! Thanks!

Dave

 

bump. i would like to know also