Editors here (well, some of us, anyway) have been pining for a bit more stealthiness in Project Evo X, our longterm 2008 Lancer Evo GSR. What good is all this power if we have to check our mirrors every time we lay into the throttle? (rhetorical question. It's worth it.)
The AMS single-exit exhaust that has been on Project Evo X since we took delivery of it is a fine piece, just not our style. Fortunately, AMS also offers for the Evo X a more stock-looking twin-tip exhaust (pictured) which also has a larger-volume muffler than the single-exit tailpipe. In theory anyway, the twin-tip should be quieter.
The twin-tip exhaust is intended to bolt in place of the single-exit muffler we currently have, so we don't have to change the whole exhaust. However, both the twin-tip you see above and the exhaust on the car started life as prototype pieces that AMS made at different times. So in our case, fitment of these one-off bits isn't assured, though AMS' production offerings are said to be plug-and-play modular pieces.
I know what you're thinking, and you're right--the more convoluted and baffled twin-tip setup may add backpressure which would compromise our power output. Hence the five silencer discs that can be swapped out just upstream of the passenger-side tailpipe tip to dial in the amount of flow / sound level you can tolerate. Pretty clever.
Rest assured we'll be doing before and after dyno comparisons to determine the penalty of stealthiness.
Jason Kavanagh, Engineering Editor
srlracing says:
01:45 PM, 02/28/09
Color me confused. I am no stranger to exotic exhaust set ups, but this one has me baffled.
waevox says:
04:34 PM, 02/28/09
So, basically, the passenger side pipe is just a straight pipe?
Quieter? Really? I guess I'll have to read up on how effective those silencer discs are.
ace47 says:
04:45 PM, 02/28/09
If you want stealth, just drive the damn MR. Give the GSR another loud exhaust, have it sticking out on the other side, make it look like a dual exhaust.
cah11705 says:
04:49 PM, 02/28/09
im with ace47 on this one. leave the silencers out and keep it loud and just make it look better. I guess you can still try out the silencers to see how they sound though.
kurtamaxxxguy says:
10:39 AM, 03/ 1/09
interesting stuff and I suspect there will be many loud nights of driving in your tuner.
Meanwhile, you'll soon have another turbo toy to acquire; the 2010 Hyundai Genesis Coupe 2.0T. Its turbo engine's very much like Lancer Evolution's, and - the holy grail - it's RWD !!! Hyundai expects tuners to swarm over it.
ice1874193 says:
07:52 PM, 03/ 1/09
^ woohoo - could only help 4b11 r&d - looking forward to more mods coming to my x...