go with Stainless. I dont think MAC makes a stainless LongTube. 
__________________ SCTx3Custom-Tune by JJ at Woodbine MotorSports, JLT CAI, Bassani SS AB, KOOKs Long Tubes, KOOKs O/R Xpipe, Livernois Stage 2 Heads, Comp Cams Stg 2 XFI SPR part#:127500, Livernois Lockouts, FRPP 39# Injectors, ARP Head Studs, Autolite HT0 SparkPlugs, FRPP 4.10, CHE LCAs, CHE Anti-squat, FRPP Springs, BMR Adj. Panhard Bar, GT500 Strut Mounts, Eibach Camber Bolts. Track Only:15x4&15x8s Rear-27'' x 10.5'' - 15" Mickey Thompson ET Street Radial, Fronts-26" x 6"-15" Mickey Thompson Sportsman S/R. | 
MAC headers h pipe. Do they have to match? 
