Mufflers, Pontiac GTO "Loud Mouth II" Bullet-Type (pair), shipping is not included. Get maximum flexibility from your GTO Loud Mouth cat-back with these ultra-low-restriction SLP mufflers. Standard equipment on SLP's GTO Power-Flo 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 304 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)