That diffuser should be plug and play...hum..looks pretty good.

 

I would retrofit that diffuser too...but with quad tips!

 

I'd keep the integrated Genuine Lexus tips! Looks high end factory expensive and professional! I wonder if they bolt on

 

You'd be able to tell by holding the new exhaust up to the car (on a lift of course) or put your stock vs. the new on top of each other

 

I'd be interested, but I have the stock diffuser right now...so even if it was a direct fit, I couldn't use it yet. Maybe someone with a quad tip diffuser will step up before I get around to it???

 

Wanna PM me a price shipped to 98281?

 

Sure PM Sent!

 

I'm with you! Definitely down for the new diffuser!

 

Heard back from Tanabe. Exchanged a couple emails. Seems they haven't tried it, so can't confirm it. Also, the rep may not have dug into the internals. Seems easy to find out but oh well.


> Tanabe: "Grant

For the Lexus RC and Lexus IS it uses a specific bolt-on exhaust systems that are specific to that application."

> Me: "Hi - Is it more about the performance could be affected or the fit? Interestingly, the RC and IS use the exact same OEM F-Sport upgrade exhaust system. That indicates they fit and performance isn't negatively affected. The RC requires a new diffuser to fit the single tips, but that's all."

> Tanabe:
"Grant,

Mainly because of the fit but not sure if the internals are dramatically different between the two."

If you have any other questions, please let us know."

 

Thanks for getting back at us with the information.

 

Any updates on the fitment????

 

I just bought a 2017 a few weeks ago and am dying for an exhaust. Any updates?

 

i think you will need to try since you have an actual 2017 with the diffuser on already as stock.

The rest of us would need to retrofit to the piece you have on your car and then buy an exhaust to try. That will be money and money just to try.

 

It doesn't fit.

We are however looking for a 2017 IS that is willing to come by for us to prototype something new for the community! Spread the word.

 

So I took my own risk ordering a RC350 Greddy axelback from JM Auto Racing to test fit them on my Lexus 3IS. Thanks JM Auto Racing for the special holiday pricing. I will let you guys know once I receive the exhaust.