SLP Performance - 04-06 GTO/C6 Corvette "Loud Mouth II" Bullet-Type (pair) Get maximum flexibility from your GTO Loud Mouth™ cat-back with these ultra-low restriction SLP mufflers. Standard equipment on our GTO PowerFlo™ system, they make it possible to switch between "wide open" and muffled exhaust configurations in a matter of minutes. All mufflers are constructed from hand-polished stainless steel and embossed with the classic SLP logo. NOTES: Sold in pairs. May also be used in the fabrication of custom exhaust systems (4.5" body, 2.5" inlet, 2.5" outlet). Does not fit 3" F-Body system. MEASUREMENTS: 2.5" ID/OD 4" body diameter 18-3/16" overall length 2" internal diameter (smallest point)