FennyMike

I'm looking to get an xforce catback since its a true dual which gets more power, and its also an exhaust that's on the quite side which I like because eventually I'm gonna be on headers. I have a 2021 IS350 which if I'm not mistaken is compatible with the 3is, so anything after 2014. I can't find any build thread or youtube video with the force for the 3is, does it exist? When I go to summit racing which has the xforce exhaust in stock right now it says compatible with 2014 and 2015. Anyone have any knowledge on this or any experience? Basically, the final question is. Xforce exhaust compatible with 2021 (3is)?

JNP1227

iTrader: (1)

We know the 2014-2020 axleback fits 21+ years. As far as midpipe, nobody has confirmed but my guess doubtful (could be wrong). I haven't seen anyone run Xforce exhaust or even heard of the company lol. Most people have remark, invidia, ark, or apexi.

FennyMike

Xforce is the best exhaust system in terms of performance since its the only true dual catback besides joez i believe.

Here is a race between two is350's, same setup only difference is the catback system

CASeoul

Curious what you mean by "true dual catback"

The 3is has a true dual exhaust from the factory, it just lacks a real X or H pipe to balance the exhaust pressure. APEXi is the only H pipe iirc. Tsudo, Invidia, and JoeZ are the ones I've seen often with xpipes, I believe Xforce is also an xpipe.

I think you might be confusing the IS 2nd gen exhaust with the 3rd gen.

FennyMike

So right now i have a remark exhaust, if I change the midpipe to a tsudo midpipe it would be a true dual catback?

FennyMike

Besides the apexi there's no other hpipe that you know of? Hpipe is better for low end torque if I'm not mistaken right? I kinda need that right now, the 0-60 on the 3is is terrible.