F1 Exhaust Manifold Ver4
Equal Length / All Stainless / Handmade
Our first joint development with a team that builds exhausts for Ferrari, Lamborghini and others. Evolved from the Ver3, keeping the 50 mm main pipe, and the best match for the F1 muffler series.
| MATERIAL | Japanese stainless steel |
|---|---|
| FIT | NSX NA1, no modification Fits the NA2 when the muffler, catalytic converter and manifold are all NA1 parts |
| MAIN PIPE | 50 mm |
| ENGINE | 3000 cc to 3500 cc, up to about 400 ps |
| MAKE | Every step handmade by one dedicated craftsman |
EVOLVED FROM THE VER3 MANIFOLD
Has there ever been an exhaust manifold made with this much obsession and this little compromise?
The biggest change: the head flange
Planned and developed over a year as the final GT-ONE model for the NSX NA1. We started by listing every concern with the old Ver3.
The biggest change is the head flange. We developed a new one that flows smoothly from the oval port to a round port, far beyond the Ver3 flange, which was simply cut from stainless plate.
This removed unnecessary welds and made the flow smoother, raising exhaust efficiency and gas speed. The higher gas speed gives an even higher-pitched sound.
A new pipe diameter
Dyno tests by the development team showed that a pipe 1 mm smaller than the Ver3 improves exhaust efficiency and speed. Better efficiency means more horsepower.
A better 3-into-1 collector
Craftsmanship where you cannot see it. The collector angle is unchanged, but the inside is carefully ground smooth with a rotary tool after welding. Every manifold is made by hand.
No more connecting springs
We removed the connecting springs at the collector. This ends the rattling sound the springs made at idle, and new processing methods cut waste and cost.
Japanese stainless, made in Japan
The stainless parts were upgraded from the Ver3 for an even better shine. Everything is made in Japan, including machining and welding: a sign of high quality.
Designed for the NA1
The NA1 exhaust layout is ideal for the NSX. A manifold built for the NA2 cannot have long enough primaries. An NA2 can use it when the muffler, catalytic converter and manifold are all NA1 parts. Our own NA2 demo car runs a full NA1 exhaust.
Engines
Fits the NSX NA1 with no modification. Fits the NA2 with a full NA1 exhaust. Suits engines from 3000 cc to 3500 cc, up to about 400 ps.
ONE CRAFTSMAN, EVERY STEP
Each manifold is built from scratch by one dedicated craftsman, through every step. The best match for the F1 Sound Muffler series. All handmade, made in Japan.
PLEASE NOTE
- A catalytic converter is required on public roads.
- The sound may become louder after installation.
- Replacing both the manifold and the muffler increases power.
- We recommend changing the ECU settings.