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I installed these last night, and I'm thrilled with the improvement for only $17 and 30 minutes of work. I don't have headers (just Borla cat back). It's a bit quieter now, but more importantly, the ~18-20K rpm drone is all but gone. I'm so happy to be able to use auto more often, without that annoying drone.. To be fair, I did have a recurring issue with leaking at the rear two slip joints. I also adjusted those & tightened everything up, which helped as well.
Sounds promising ! , ill try this on my ISS Forged catback des . but any idea if it will fit in my exhaust ??
probably not. you will have to do what I did, measure the inside diameter of the exhaust outlet with a vernier caliper. The borla outlets are 50mm, so these 48mm inserts fit perfectly. These are available in different sizes, so depending on the size of the ISS outlets, there may be one that would work.
Sounds promising ! , ill try this on my ISS Forged catback des . but any idea if it will fit in my exhaust ??
I think the ISS exhaust outlet is larger than the Borlas. You may need to find one that will fit the ISS or modify these to make them seal the second outlet.
I think the ISS exhaust outlet is larger than the Borlas. You may need to find one that will fit the ISS or modify these to make them seal the second outlet.
Correct, mahcah. The ISS DES has double-walled tips, and the inner wall slants out to meet the outer wall. My cheap calipers don't have arms long enough to reach into the tips far enough to get an exact measurement on the inner wall diameter of my ISS tips. But I got in there as far as I could and eyeballed it and came up with ~2.391" or 60.7mm. So if a 60mm is available, it MAY work. Because of the ISS double-walled tips, attaching the set screw would involve a little creativity. Perhaps drilling a larger hole in the outer wall in an inconspicuous area to give you access to the inner wall where you could drill a smaller hole for the set screw? Very tempted to try this...
It would be kinda hard to tell on videos tbh. You need to do it yourself and hear it in person. There is definitely less to no drone in the cabin even in city cruising. I like it. I had the Magnaflows Quad Tip from RR on and now I much prefer this for daily driving utilizing the Borla Muffers. I will try this on the Magnaflows to see if it will quiet down to my taste for DD when the parts come in for the larger exhaust outlet size.
02-04-17, 05:48 AM
