Invidia Q300 Single Exit Cat Back Exhaust - Titanium Tip - 2006-2011 Honda Civic Si Coupe Up-Pipes & Down Pipes 50mm thread pitch allows for

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Invidia Q300 Single Exit Cat Back Exhaust - Titanium Tip - 2006-2011 Honda Civic Si Coupe Up-Pipes & Down Pipes 50mm thread pitch allows forQ300 Single Exit Cat Back Exhaust with Titanium Tip for the 2006 2011 Honda Civic Si The Invidia Q300 Single Exit Cat Back with titanium tip for the 2006 2011 Honda Civic Si brings Q300 level sound refinement to the eighth generation Si's K20Z3 naturally aspirated engine. The high revving K20Z3 responds to exhaust work with improved breathing in the upper RPM range, the Q300's improved flow is most noticeable from 5,500 8,000 RPM where i VTEC operates