Should be the same thing...I don't think anything is THAT much different exhaust wise on the SeriesIII vs. the SeriesII.
You can always try it out...buy them and send em back LOL
well ya your right, now I just need to decide if I just go with ss auto chrome headers or what. what you think ??
2007 Pontiac Grand Prix GT Series III 3.8 Super Charged AL 104's Plugs, 180* T-Stat, Tuned PCM , Custom CAI is complete and installed, AeroForce Interceptor gauge, Smoothflow 3.5 pulley with 0* KR, SSAC SS Headers. 6000K HID