EXHAUST_BUILD

The stock N20 exhaust is quiet by design — tuned for comfort, not character. It also leaves flow on the table with a restrictive mid pipe and a muffler that kills whatever tone the engine actually has. The goal was a full downpipe-back system that improves flow, adds measurable power, and gives the N20 a sound that reflects what the car is being built into — without being obnoxious daily.

The AWE Touring Edition Exhaust with Performance Mid Pipe replaced the entire system from downpipe back. The mid pipe is a full 3" resonated unit, CNC mandrel bent from T304 stainless — no compression bends, no flow restrictions. The axle-back section uses AWE's 180 Technology, which uses reflection chambers to cancel specific unwanted frequencies rather than packing the muffler with material. The result is a system that's mellow at cruise and opens up properly at wide-open throttle, without drone. Tip is a 90mm double-walled diamond black unit, single side exit.

After install, a leak was discovered at one of the clamp joints. Rather than continuing to chase it with clamps, the decision was made to have the joint welded. A permanent fix over a recurring one — the system isn't coming apart for any reason that requires disassembly at that joint, so welding made sense.

The upgraded mid pipe diameter also created a clearance problem — the larger pipe was contacting the stock exhaust brace bracket under load, causing a tapping noise. The Mashimarho F-Series Upgraded Exhaust Brace resolved this. It's a direct replacement for the factory brace, designed specifically to clear the larger diameter mid pipes that the stock bracket wasn't built for.

AWE was chosen for the combination of build quality, the no-drone 180 Technology, and the lifetime warranty. The Touring Edition specifically was selected over the Track Edition because this car gets daily driven — a system that's loud all the time gets old fast. The Mashimarho brace wasn't in the original plan, but it's the correct fix for a real problem rather than a workaround. Welding the joint was the same logic — solve it properly once.

The N20 sounds like it has intent now. Cruise is clean, no drone, no cabin resonance. Gets noticeably louder past 4,000 RPM. The weld eliminated the leak completely. The Mashimarho brace eliminated the tapping. No issues since.