[86MLR]

Cool story bro story from 86MLR:

I have noticed no real difference between MY17 decated header and a Tomei UEL header ($800AUD), that was with a 2.5" overpipe, catless 2.5" front pipe and 2.5" cat back.

Ecutek tuning

Actually, the only real noticable difference the UEL had was the deafening noise now at cold start.

So I replaced the OEM cated front pipe and full OEM exhaust which lost a little up top but knocked cold start noise right down. Exhaust was much quiter.

From there I punched out the cat in the OEM overpipe.

Cold start is now still pretty loud (I defeat it by resting my foot on the accelerator), cold start is now 105db, once cold start is finished the exhaust idles at 63db and tops out at 83db at 7k rpm.

So, now, my car doesn't have a heat signature of a Carl Gustaf rocket laucher, but makes the same power as when it did.

I am seriously contemplating replacing the decated OEM header, the only real noticable difference the UEL header has over the OEM decat is annoyingly loud cold start and a dropped cylinder beat.

Moral of the story, don't waste your time with a UEL header, a OEM header with it's guts knocked out will flow typical at these power levels.

If you do get a aftermarket header make sure it flows better within your powerband than a decated OEM header.

Someone should send you and me a ACE A350 for "comparison testing".

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