Apexi N1 dual muffler exhaust system for the Mazda RX7.

N-1 Dual Mufflers are a variant of the popular single-tip N-1 series mufflers. The N-1 dual piping splits into two smaller-diameter pipes just after the catalytic converter and flows into a pair of 120mm canisters. The canisters are polished off with aggressive 90mm tips. The use of a smaller piping diameter helps retain more mid-range torque. The Dual N-1 does not sacrifice peak horsepower because the dual pipes can handle more exhaust gas volume. Piping is treated with high-temperature titanium particle coating, and the canisters and tips are constructed of polished SUS 304 stainless steel. Optional 90mm Super Silencers can be used to reduce noise levels by up to 7 decibels.
 
Product fits: 1989 Mazda RX7, 1990 Mazda RX7, 1991 Mazda RX7, 1986 Mazda RX7, 1987 Mazda RX7, 1988 Mazda RX7