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two brothers exhurst pipe
- Thread starter ssmcclub
- Start date
BLUEKNIGHT911
Sadly Passed Oct 2024 - RIP
TWO BROTHERS EXHAUST
......I don't think their muffler removes the " CAT "......CAT removal is a separate procedure , imo, .........and Power gains on the Spyder engines are ..imo... very difficult to achieve because of all the corrections the computer system will make ....to counteract what you have done................It has been shown that " CAT " removal which gives you a more free flowing exhaust ...actually hurts performance.....because it reduces the backpressure TO MUCH.......some have added the " BIG CITY THUNDER " BAFFLE and say this helps...................good luck, ..Mike :thumbup:......NEW INFO...MMMII & fencepost are more familiar with the F-3 exhaust system so ignore my first two sentences
......I don't think their muffler removes the " CAT "......CAT removal is a separate procedure , imo, .........and Power gains on the Spyder engines are ..imo... very difficult to achieve because of all the corrections the computer system will make ....to counteract what you have done................It has been shown that " CAT " removal which gives you a more free flowing exhaust ...actually hurts performance.....because it reduces the backpressure TO MUCH.......some have added the " BIG CITY THUNDER " BAFFLE and say this helps...................good luck, ..Mike :thumbup:......NEW INFO...MMMII & fencepost are more familiar with the F-3 exhaust system so ignore my first two sentences
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MMMII
New member
The Two Brothers pipe DOES remove the cat..ok thank you
fencepost
New member
Yes it will remove the CAt. The TB muffler will not connect to the stock mid pipe. I had the TB on my F3 and Lamont's pipe on my wife's F3. I had installed the Big City Thunder baffel in both, the TB system was running lean, 30° hotter and had quite a bit of decell poping. Both bikes now have Lamont's pipe with BCT baffles and stock muffler. Mid range performance has been restored with this setup and fuel millage has improved
MMMII
New member
I think the Power Commander w/auto-tune makes the difference. I don't have any decell poping and although I can't ryde conservative enough to get a good estimate
my previous numbers were low-mid 30 mpgs.Similar threads
