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Diffuser help

572 Views 6 Replies 4 Participants Last post by  rvalero, 
rvalero
I test fit a polyU diffuser before I have it painted, and it looks like the FI exhaust tips will sit ~3/4” inside of the diffuser. When FI installed their 14” touring kit, they said that it is already extended as much as it should be. I’m sure I can lower the tips a little by adjusting the hanger brackets, but I’m worried that the hot exhaust gasses will melt the diffuser. Do you think I have anything to worry about?

FYI, this is just a test fit, and the ends aren’t fully secured.
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IridiumRS400
Hmm, I didn't have that problem when I had the Seibon CF Diffuser installed:
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N3iL
rvalero said:
I test fit a polyU diffuser before I have it painted, and it looks like the FI exhaust tips will sit ~3/4” inside of the diffuser. When FI installed their 14” touring kit, they said that it is already extended as much as it should be. I’m sure I can lower the tips a little by adjusting the hanger brackets, but I’m worried that the hot exhaust gasses will melt the diffuser. Do you think I have anything to worry about?

FYI, this is just a test fit, and the ends aren’t fully secured.
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When I Installed my FI 14'' CB. I added 3 washers between one of my hangers and the body. Using it as a spacer so the muffler would sit lower in the cutout. My tips were not even and it bugged TF outta me!!! I wouldn't pull them futher out because Kevin @ FI has told me horror stories of them eventually coming apart :0 Told me only a half inch outta the slip fit at most! They are only adjustable side to side. (Left to Right) Mine are 3/4 of an inch from the diffuser. Haven't Melted yet!
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rvalero
IridiumRS400, that's exactly the way I wanted my exhaust tips to sit in the diffuser.

N3iL said:
When I Installed my FI 14'' CB. I added 3 washers between one of my hangers and the body. Using it as a spacer so the muffler would sit lower in the cutout. My tips were not even and it bugged TF outta me!!! I wouldn't pull them futher out because Kevin @ FI has told me horror stories of them eventually coming apart :0 Told me only a half inch outta the slip fit at most! They are only adjustable side to side. (Left to Right) Mine are 3/4 of an inch from the diffuser. Haven't Melted yet!
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I did the washer trick to the hanger bracket on my IS300, and I planned to do it again with the Q60. I wish I could extend the muffler without cutting them. At least I shouldn't have to worry about my diffuser melting.
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rvalero
Finally installed it. Looking at the surface area used to adhere the upper portion, I’m worried about the diffuser separating from the bumper. I used 3M super strength molding tape and 3M adhesion promoter after cleaning the surface with 1:1 distilled water and isopropyl alcohol.
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Irfiee
quick question for the ones who installed the diffuser. Some are putting it over the oem diffuser and drilling it from the bottom, and others are taking the oem off and then putting it on. Not sure which route to take?
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rvalero
The install method depends on the diffuser.
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