Question for Stillen Exhaust owners

Red370 · 02-25-2010, 02:47 PM

I didnt really notice it until recently, maybe I always have my music too loud, who knows. But right when I turn the car off, theres a consistent thud I hear, not a metallic thud either, and it sounds like its coming from right around the resonator area, i've never had this happen with any exhaust setup in my life. Now, one would think "hey, its just the metal cooling off after being heated", and thats what I initially thought. It never happened with the stock exhaust on my car once. You can actually hear the thud from inside the cabin, and its even more prevalent when you peek down underneath the car. To describe the sound, it sounds like someone is flicking the pipe with their finger around every 8-10 seconds or so. Not sure if this is normal or not, has anyone else had the same experience? I personally torqued each bolt as tight as possible, so i guarantee theres zero chance of it having a leak or loose bolt.

mattkim85 · 02-25-2010, 03:13 PM

does the same thing on mine.

i am no expert, but like you said, i think its the heated metal cooling off.

Red370 · 02-25-2010, 03:19 PM

Quote:

Originally Posted by mattkim85

does the same thing on mine.

i am no expert, but like you said, i think its the heated metal cooling off.

I've just never heard an exhaust make such a loud thud from cooling, usually you hear little metallic "tink" sounds, glad im not the only one thats hearing it though!

spearfish25 · 02-25-2010, 05:14 PM

In the summer time, it's very noticeable. No worries.

Red370 · 02-25-2010, 05:57 PM

ahh, comfort, I <3 you guys.

Red370 · 02-25-2010, 05:59 PM

i'm curious if any of the other systems have this same problem

spearfish25 · 02-25-2010, 06:26 PM

any metal exhaust will make this pinging sound on cool down

Red370 · 02-25-2010, 06:30 PM

I never had that with the magnaflow I had on my G, or the Injen I had on my GSX, which is why it seemed new to me. I know exhausts will make a pinging sound when they cool, but this one thuds more than pings ya know?

spearfish25 · 02-25-2010, 08:54 PM

Haven't really noticed any thuds. Video?

Red370 · 02-25-2010, 08:57 PM

Quote:

Originally Posted by spearfish25

Haven't really noticed any thuds. Video?

i'll record it tomorrow, happens every time I drive and park it, shouldnt be too hard to get.

NewlyIMPORTed · 02-25-2010, 09:55 PM

red till have you know that ridiculous picture you have distracts me haha

Red370 · 02-25-2010, 10:11 PM

Quote:

Originally Posted by NewlyIMPORTed

red till have you know that ridiculous picture you have distracts me haha

what is it with you people making fun of me! I'm working on having my teeth fixed, geez!

02-25-2010, 02:47 PM	#1 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 296	Question for Stillen Exhaust owners I didnt really notice it until recently, maybe I always have my music too loud, who knows. But right when I turn the car off, theres a consistent thud I hear, not a metallic thud either, and it sounds like its coming from right around the resonator area, i've never had this happen with any exhaust setup in my life. Now, one would think "hey, its just the metal cooling off after being heated", and thats what I initially thought. It never happened with the stock exhaust on my car once. You can actually hear the thud from inside the cabin, and its even more prevalent when you peek down underneath the car. To describe the sound, it sounds like someone is flicking the pipe with their finger around every 8-10 seconds or so. Not sure if this is normal or not, has anyone else had the same experience? I personally torqued each bolt as tight as possible, so i guarantee theres zero chance of it having a leak or loose bolt. __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs Last edited by Red370; 02-25-2010 at 02:50 PM.

02-25-2010, 03:13 PM	#2 (permalink)
mattkim85 Base Member Join Date: Dec 2008 Location: los angeles, ca Age: 39 Posts: 230 Drives: 09 Z34, 08 AP2 Rep Power: 17	does the same thing on mine. i am no expert, but like you said, i think its the heated metal cooling off. __________________ Fast Intentions CBE 18" , Berk HFCs, Injen CAI, KW V3, Rear SPC Camber Kit, VOLK RE30's

02-25-2010, 05:14 PM	#4 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	In the summer time, it's very noticeable. No worries. __________________ 2013 Cadillac V-Wagon, RIP Z

02-25-2010, 05:57 PM	#5 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 296	ahh, comfort, I <3 you guys. __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs

02-25-2010, 05:59 PM	#6 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 296	i'm curious if any of the other systems have this same problem __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs

02-25-2010, 06:26 PM	#7 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	any metal exhaust will make this pinging sound on cool down __________________ 2013 Cadillac V-Wagon, RIP Z

02-25-2010, 06:30 PM	#8 (permalink)
Red370 A True Z Fanatic Join Date: Jul 2009 Location: Kaiserslautern, Germany Posts: 4,391 Drives: your mom to church Rep Power: 296	I never had that with the magnaflow I had on my G, or the Injen I had on my GSX, which is why it seemed new to me. I know exhausts will make a pinging sound when they cool, but this one thuds more than pings ya know? __________________ 2011 Mustang 5.0 \| 3.55's \| Lethal Performance off road H-Pipe \| Magnaflow Muffler Delete \| JLT CAI/Bama tuned 417whp/ 404 ft/lbs

02-25-2010, 08:54 PM	#9 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1857	Haven't really noticed any thuds. Video? __________________ 2013 Cadillac V-Wagon, RIP Z

02-25-2010, 09:55 PM	#11 (permalink)
NewlyIMPORTed A True Z Fanatic Join Date: May 2009 Location: Kennesaw, GA Posts: 1,109 Drives: 11 STI Sedan Rep Power: 18	red till have you know that ridiculous picture you have distracts me haha __________________ 2011 WRX STICobb Accessport, Nameless Performance exhaust, COBB SF Intake, COBB downpipe, 20% tint, Work Emotion XD9's

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