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The mkiv Supra Owners Club

Apexi active tail silencer


mark newman

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Mine is on an N/A, and definitely improves bottom end torque without any top end loss, in fact it feels quicker with it.

 

7dB makes a BIG difference to the noise, and it removes the low drone too.

 

No worries with EGT at tickover.

 

When you open up the engine, the valve opens up and lets the noise out, but nice and quiet around town and at cruise, you might even like it.

Edited by David P (see edit history)
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Mine is on an N/A, and definitely improves bottom end torque without any top end loss, in fact it feels quicker with it.

 

7dB makes a BIG difference to the noise, and it removes the low drone too.

 

No worries with EGT at tickover.

 

When you open up the engine, the valve opens up and lets the noise out, but nice and quiet around town and at cruise, you might even like it.

 

Ah the only thing about this is the NCT test the car at 3/4 of the cars rev limit. I'm guessing the valve would be open & just as loud as it is now?

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There are 2 sizes, mine is the larger @ 115mm, the smaller size is 90mm.

 

http://www.apexi-usa.com/products/?id=5327

 

"The ATS was developed as a high performance evolution to the standard tail pipe silencers available in the market today. While many people enjoy the power gains of a racing exhaust on the track, often times these systems require a silencer to be installed in the tip for use on the street. While sound output can be dramatically lowered using a non-adjustable silencer, unfortunately response and power tend to suffer due to increased exhaust gas restriction. The ATS (Active Tail Silencer) uses the same active valve technology as the PS Revolution exhaust system. The spring loaded valve is engaged and disengaged based upon exhaust gas pressure. This allows for effective sound suppression for the street, without the power loss under high load. Dyno tests have proven power levels to be nearly identical to an exhaust using no silencer at all. * Please note that, due to the tapered tip of the N1 Evolution exhaust system the ATS Silencer WILL NOT fit properly. This is only true for the N1 EVOLUTION mufflers, all other"

Edited by David P (see edit history)
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Dreadful idea, just like adding a tiny restrictor ring. You need proper silencers that absorb sound not restrictions. If the opening is small it's robbing efficiency, on or off boost, spring loaded or fixed. Why is it that as car models get older and cheaper owners feel the need to make them noisier and noisier? :) There was never this obsession with noisy exhausts a few years back when the cars were a lot newer.

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