FMF Q4 muffler for carbed vs EFI bikes.

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Oct 30, 2019 | 08:32 PM

gronk

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Joined: Oct 2019

Posts: 46

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FMF Q4 muffler for carbed vs EFI bikes.

FMF has different model numbers for the pre-2015 models and 2018+ models. Is the difference just the O2 bung?

Oct 31, 2019 | 10:16 PM

Tacoma660

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From: Rome, NY

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ima say yes

Nov 15, 2019 | 12:45 AM

b_joannblue

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Joined: Jan 2007

Posts: 163

From: Wichita, Kansas

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Hello all, I just finished installing a 351 on a 2019 klx250 with an FMF slip on & air box lid on 26.53 HP 21.00 Torque with the EJK that I modified for the 351 kit. I also installed a Barker exhaust on this bike, didn't modify the tuning of the EJK; we got 29.0 HP 20.78 torque. Modified EJK for 351 kit now available, B&B Cycle Restoration.