Exige S 2ZZ-GE 8"dia Re-Packable Thru-Diffuser System

This system has all the features required to keep your track/race exhaust in tip-top condition.

The cheap/rigid exhaust mounts place a huge load on the hanger brackets, so I've moved them to a saddle-clamp layout. These have an in-built flexibility to isolate the system from excessive engine/transmission movements.

The silencer body itself is made from 0.8mm thick stainless steel. The inlet end-cap experiences the most stress, so the silencer is double-skinned at that point and the end-cap welded in place.

The removable outlet end-cap is a 2bular pressing with a tapered flange to ensure a good seal once it's pushed home. I now use stainless pop-rivets to hold the end-cap - quick/easy to replace - threaded fasteners tend to gall (seize) when exposed to exhaust heat. On this Thru-Diffuser system, the inlet/outlet holes in the silencer end-plates are OFF-SET to push the silencer inboard away from the rear grilles/number-plate.

I use the double-skinned inlet end plus another baffle-plate to form a Helmholtz resonance chamber. This drops the noise-level another 5dbs approx. It's a real PITA to fabricate but it works very well.

The US copy of my design supplied by BOE/BWR (their "Silent Touch version") unfortunately off-sets this H1 chamber to the silencer pipework. So it's not a "straight-Thru" design. They admit this costs some power although it does help with noise-control. However, this layout sets up a terrible resonance which shakes all the end-cap fittings loose. I know all this because their unhappy customers contact me for a solution! They also use "scrubble" (swarf!) for a packing material - heavy/useless - but it might control the dronnnnnne ;-)

BOE/BWR is a 7"dia silencer Vs. 2bular 8"dia.

The Thru-Diffuser pipework is removable to make the re-pack task easier - held with a very secure V-band connector. All-in-all, a very high-quality race exhaust system.

£750.00 (inc. VAT)
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