Ford Focus RS Forum banner
Cancel
Create thread New Garage Forums

Exhaust Note Rattle in Particular RPM Range (Catless + Cat back)

Jump to Latest
7.6K views 6 replies 4 participants last post by  RedRS18  
#1 ·
Does anyone with a catless DP + Aftermarket catback (I have an AWE Track) experience an extraneous rattle in the exhaust note? I am experiencing this specifically between 2500-3200 RPM if I open the throttle up 60-70%+. I just installed poly exhaust hangers over the weekend. There is one point in particular where the exhaust is just shy of a finger width in distance between the heat-shield. I wouldn't be surprised if when the car is under load and the engine torques, if it is making contact here, under the right amount of throttle.

Any thoughts? I'd appreciate any suggestions.
 
#2 ·
Probably the downpipe hangers. A few people have had contact there when the vibration is just right.
 
Save
Reply Quote Like Like
#3 ·
Yeah, I think that's making some contact too. I've already made up a spacer between grey exhaust hanger piece and where it bolts. Seems to have helped some, but not entirely. It's kind of crazy that hitting right there would create a vibrating exhaust note, but I guess it makes sense.

I noticed some people have shortened the length of the downpipe hangers, but my pops is thinking we should try and bend them a different way, at 2 points, in each hanger. He thinks we can bend them so the downpipe will sit up higher. He's been a Master Diesel tech for 25+ years, so I am just going to roll with his tactics. xD
 
#4 ·
Reviving an oldish thread. I recently installed the Borla S-type catback (3" pipe) and noticed a rattle at low RPM. It might be there at higher RPMs, but I can't hear it over the exhaust note. So I crawled underneath and shook the heck out of everything. The only thing I could make the exhaust contact was the driveshaft center bearing support; the one that lines up with the 'B' pillar. This is the black bracket circled in the picture below. It also corresponds with the triangular section of the OEM exhaust, which apparently was designed for clearance.

Anyone seeing/hearing this with 3+" exhausts? Any solutions?
 
Save
Reply Quote Like Like
R
#5 ·
dkirby said:
Reviving an oldish thread. I recently installed the Borla S-type catback (3" pipe) and noticed a rattle at low RPM. It might be there at higher RPMs, but I can't hear it over the exhaust note. So I crawled underneath and shook the heck out of everything. The only thing I could make the exhaust contact was the driveshaft center bearing support; the one that lines up with the 'B' pillar. This is the black bracket circled in the picture below. It also corresponds with the triangular section of the OEM exhaust, which apparently was designed for clearance.

Anyone seeing/hearing this with 3+" exhausts? Any solutions?
Click to expand...
Reviving an old thread again but I have this exact same issue with my AWE track edition. Did you ever figure out a solution?
 
Ford Focus RS Forum
posts
548K
members
23K
Since
2015
FocusRS.org is the largest forum community to discuss the 2016+ Focus RS. Join to talk about performance, specs, reviews and more!
Full Forum Listing
Explore Our Forums
Focus RS Discussions Focus RS Performance Focus RS Purchasing Focus RS TroubleShooting Focus RS Photos and Videos