[M4Ghost]

The Fi exhaust sounds so mean holy hell. But the ones online had catless down pipe. Doesn't that require a tune?

Out of the two exhaust systems what is a better
Exhaust system that doesn't require tuning

[VicJohn]

If u doing cat back don’t need tuning, also depends what ur original spec is, mine is non OPF car, anything changes after primary Cat doesn’t need tuning. By the way, Akra is titanium and FI is Stainless steel, personal preference on exhaust note I guess. Not sure on FI WEIGHT , but Akra should be lighter since its Titanium and more expensive overall

[HZX540e]

Excellent question, this is like music it depends on your taste. I went with FI because I liked the tone. You can't go wrong with either. As the post above stated, in the US (and other non-OPF models) only the primary cats are monitored. So changing anything past that does NOT requires a tune.

[M4Ghost]

Originally Posted by HZX540e

Excellent question, this is like music it depends on your taste. I went with FI because I liked the tone. You can't go wrong with either. As the post above stated, in the US (and other non-OPF models) only the primary cats are monitored. So changing anything past that does NOT requires a tune.

How do you enjoy it?

I found the video last night of the black x6m and that sounded so mean!

[HZX540e]

Originally Posted by x3mghost

How do you enjoy it?

I found the video last night of the black x6m and that sounded so mean!

I love it, check out the thread I started with installation instructions and videos with/without downpipes.