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SuperTrapp 4A Long Glasspack with Diffuser - 2" dia SST

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Brand: SuperTrapp Industries

The patented radial diffuser design of SuperTrapp mufflers allow you to tune your muffler by adding or removing diffuser discs. Fewer discs result in a quieter system with more backpressure, while more disks increases noise and lowers back pressure. You can gain a measureable performance advantage by wave tuning your engine and carburetion to produce the best power band for any track. In certain racing classes where carb tuning is restricted, the SuperTrapp has become standard equipment. Many race teams have also equipped their tow vehicles with SuperTrapps and in almost every case this has improved gas mileage and performance while helping to reduce detonation.

This stainless steel muffler combines the tuneable 4" diameter diffuser disc section with a fully-rebuildable 24" glass pack section to further reduce high frequency sounds. Even the glass pack versions are straight-through designs with no louvers to restrict exhaust flow. With the combined good looks and added durability of a brushed stainless steel body, a SuperTrapp muffler could be the last muffler you ever buy.

Fits 2" OD exhaust pipes. Weighs 5.5 pounds. Comes complete with 12 diffuser discs, body support clamp, and T-bolt mounting clamp.

Part No.
Stock Status

Condition: New

In Stock



I use this muffler on my 2014 Spyder. It is the only after market muffler that looks good, only 5 lbs and does not blow my eardrums out.




Supertrapp for old cars


I built a 51 MG TD to look like an SCCA racer, but to be driven on the street. The Supertrapp fits this image of "competition" but allows me to make it as quiet or loud as I want. Also the fact that it's rebuildable makes the slightly added cost tolerable. I really like the ease of adjustment ( remove or replace discs) and the appearance of the unit. Being made of stainless steel I don't have to worry about it rusting out, unlike the MG that has to be really protected from the elements!

mga bob

Greenacres, WA


SuperTrapp 4A Long Glasspack with Diffuser - 2" dia SST

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