03-06 Infiniti G35 (Coupe Only) Full Stainless Gt Dual Catback comes with the extention for g35 -dual exhaust , real hp gain.15 hp. 100 % full polish stainless steel with polish finish - CNC machine flanges for strong solid support TIG weld for strength and durability - 2.5" pipe size /4.5" tip. comes with titanium tip cover. mandrel bend - light weight ( 25 lbs lighter then stock ) Increase 20-30 horse power and torque Straight thru design and bolt-on installation