− Decrease quantity for Exhaust System, Mega Power RR, Cat-Back, 3.00 in. Pipe, Polished Muffler, Resonator, 4.33 in. Polished Tip, use on Honda®, Civic EX/Si, Kit Quantity + Increase quantity for Exhaust System, Mega Power RR, Cat-Back, 3.00 in. Pipe, Polished Muffler, Resonator, 4.33 in. Polished Tip, use on Honda®, Civic EX/Si, Kit Add to cart