Hi all-

I have a 2016 IS300 F-Sport AWD and I have a 2017+ OEM Lexus diffuser coming in and I want to switch to a quad exhaust tip setup. Can anyone tell me what the inlet size is and also any recommendations on the outlet size that works with that diffuser and looks nice? I don't want to get a full new exhaust setup just yet as I've already dropped a lot of money into the car and want to relax a little bit, if I did get a new setup it wouldn't be until next summer when I plan on possibly supercharging my car. Thanks!

 

i got a 14' AWD IS350 and am going the same route:

1. 2017+ Rear Diffuser
2. Quad Tip Exhausts (Remark Axle Back)


will take some measurements for you but there's pictures in the BUILD section that should help:


here are a few CL Members and hope you don't mind me using your picture:

 

If you don't mind me asking who is the member for the middle picture?? Or if you know what add on diffuser that is in the middle?

 

From what I saw the inlet size is 2.25 inches. I ordered a set of tips and when they get here I will see if that is the size and update for anyone in the future who may need to know

 

the member is @NikNikNik
He may have that diffuser add-on for sale. His instagram is slowhite_lexus

 

I just measured on my OEM axleback sitting in the garage. From the stock muffler the pipe is 2.25 inside diameter. Just over .055" thickness for 2.36 outside diameter. Wow, I finally had a real use for my vernier caliper!

Hey GR3Y5H3ART whose is the first silver one? I like the spacer fitment and the aggressive stagger tips.

 

Awesome thanks for the confirmation glad to know that what I got will fit

 

The first picture is mine. I was running quad 3.5 inches carbon fiber tips that were just welded on the factory muffler. Now I run quad 4 inches axel back system.






If you want to keep the factory mufflers you have to cut off the factory bracket and use 2.5 inch inlet to slip over the factory pipe and weld it on, the bolt on system would stick out too much.

 

Lol can't believe it. He lives in the same city as me lol. What's the odd of that. 😂

 

in regards to the just welding onto factory muffler, what is a good length where it won’t stick out too much?