ISR Performance Exhaust Y-Pipe - Infiniti Q50 / Q60 RWD 3.0TIS Q5060 Y ISR Performance Exhaust Y Pipe Infiniti Q50 Q60 RZ34 3. 0T RWD The ISR Performance Q50 Q60 RZ34 3. 0T Y pipe utilizes 2. 75" stainless steel piping along with bellowed flex sections running from the 2 bolt catalytic converter flanges back to the high performance velocity merge. The Y pipe then steps to 3" stainless piping coming out of the velocity merge to the rear 3" exhaust flange. The Y pipe also features an integrated dimpled gusset
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