I was looking at buying these because I can buy them cheap locally for my 05 track.

I have an invidia gemini exhaust coming as well, I haven't been able to find any reviews on the 350 for the invidia pipes.

Are they decent?

And also it says they already have a hole for your o2 sensor. Will I still need a defouler?

Thanks

 

i have the 50 mm invidia test pipes and i definitely love them. good build quality.
they already have holes for the 02 sensors but not so sure about the defouler since i have an 03 and never worried about it.