Plm .. i wouldn't call them "makers". Looked like shameless copy of Nameless's.
Also Plm's & Ace's are 4-2-1.
Ace makes also headers of 4-1 design (anaconda), but runners are shorter then better known 4-2-1 ones that merge in overpipe portion. Hmm, then again Ppe's are similar .. so i'd rather say that there are no longtube AND of 4-1 design headers around for our cars
