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[Fonzie]

I have an 18 triglide I'm thinking bout deleting cat....l have a set of fish tails from my 01 l want to put on....want more noise then stock...will l need to retune or anything else?

[dayne66]

Welcome....from The Island!

[fastfreddy]

 yes .... a tune will be needed if the cat is removed

[rayson56]

^^^  and add a more efficient air cleaner while you're at it.

Welcome!

[grc]

When changing out just the slip-on mufflers a new tune is usually not required.  When you change out the entire system and eliminate the cat, you absolutely should get the bike tuned.

Btw, I was always under the impression those fishtail exhausts were power killers.    I always liked the look, but not the sound, so I never tried them.

Jerry

[Fonzie]

Thanks all.....l had the tails on my 01 and they sounded great and l had plenty of power