− Decrease quantity for Exhaust Pipes, Straight, Titanium, 4.00 in. O.D., 39.40 in. Length, Natural, 18-Gauge, Each Quantity + Increase quantity for Exhaust Pipes, Straight, Titanium, 4.00 in. O.D., 39.40 in. Length, Natural, 18-Gauge, Each Add to cart