Exhaust is usually the first thing an R35 owner buys and the thing they most often get wrong. Not because they buy a bad system, but because they buy a system built for a car making twice their power, and then live with the drone forever.
Here is how to pick correctly the first time.
Size it to your power, not to your ego
An exhaust does not create power. It removes a restriction. If the restriction is not there, the pipe does nothing except make noise and cost money.
- Stock or BPU turbos: 3-inch downpipes. This is the biggest single bolt-on gain on a stock R35, full stop.
- Upgraded stock-frame or big turbos: 4-inch. The 4-inch titanium exhaust is the workhorse for serious builds.
- Very big power: the Magnum 4.5-inch titanium, the largest R35 exhaust on the market. Dual 4-inch merging into a single 4.5-inch.
Putting a 4.5-inch Magnum on a BPU car will not make it faster than a 3-inch system. It will make it louder and lighter, which are fine reasons, but be honest with yourself about which reason you are buying for.
The drone question
This is the thing people ask us about most, and the thing they regret most.
Drone is the low-frequency boom that shows up at steady highway cruise, usually somewhere in the 1,800-2,500 rpm range. It is not the same thing as loud. A loud exhaust that does not drone is a joy. A quiet exhaust that drones will make you hate your car on a two-hour drive.
Your three options for controlling it
1. Valved sections. The best of both worlds and what we recommend for anything that sees street miles. Boost-activated valves stay closed at cruise for a quiet cabin, then open under boost. Available for both the 4-inch titanium system and the Magnum 4.5-inch. The Magnum valved section reuses your existing tips.
2. A resonated midpipe. The 4-inch resonated midpipe tames drone and interior resonance while keeping the full 4-inch path. You give up a hair of flow versus a straight pipe and gain your sanity.
3. Accept it. If the car is a track or drag car, run the 4-inch race midpipe, which flows straight through, and do not worry about it.
Race vs resonated midpipe: the actual difference
The race midpipe is straight-through for maximum flow. The resonated version adds a resonator to cancel the frequencies that cause drone. Both are full 4-inch. Both are designed specifically for Boost Logic 4-inch systems.
If your GT-R has a license plate on it, buy the resonated one. Nearly everyone who buys the race pipe for a street car eventually asks us about swapping it.
Midpipe options for BPU and mid-power cars
If you are not running a 4-inch system, you have two excellent midpipes:
The Formula Series Quadzilla titanium midpipe is fabricated 100% from titanium and weighs 3.8 lbs. It runs 2x75mm into 4x60mm into a single 90mm. It is a genuinely beautiful piece of fabrication.
The coated stainless Y-pipe runs 2x75mm into a single 90mm through a proper merge collector with twin flex sections. It costs less and does the job.
The link pipe mistake
Read this part twice, because it is the most common ordering error we see.
Boost Logic 4-inch downpipes do not bolt directly to your exhaust. They need link pipes, and the correct set depends on what system you are running:
- Running the 4-inch Race or Resonated midpipe? You need this set.
- Running the Magnum 4.5-inch? You need this different set.
They are not interchangeable. If you are unsure which you need, ask us before you order rather than after your car is on a lift in pieces.
Why titanium actually matters here
The R35 leaves the factory around 3,800 lbs. It is not a light car, and the exhaust is a meaningful chunk of metal hanging off the back of it.
Full titanium construction takes real weight out, and it does it at the worst possible place for weight: low, long, and behind the rear axle. The titanium 4-inch dump tubes weigh 1 lb each, the lightest option on the market. The Quadzilla midpipe is 3.8 lbs.
Titanium also handles heat better, which matters more than people think when you have big turbos dumping into it. See everything titanium we carry in the GT-R titanium range.
Want the look without the money?
The F16 titanium exhaust tip set bolts on in minutes and gives you an aggressive look without buying a full catback. Raw or burnt blue. It is the highest-impact-per-dollar cosmetic mod on the car.
Putting it together
Stock/BPU street car: 3-inch downpipes, Y-pipe or Quadzilla midpipe, tune. Done.
Big turbo street car: 4-inch downpipes, correct link pipes, resonated midpipe, 4-inch titanium exhaust with a valved section.
Track or drag car: 4-inch downpipes, titanium dump tubes, race midpipe, Magnum if you want the biggest system made.