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Going back to OEM exhaust

This is a discussion on Going back to OEM exhaust within the Grom Talk forums, part of the Honda Grom Forums category; isnt the muffler still a slip on? If so then an aftermarket exhaust header part should still fit and could still use the OEM muffler??? ...

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Thread: Going back to OEM exhaust

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    isnt the muffler still a slip on? If so then an aftermarket exhaust header part should still fit and could still use the OEM muffler???
    or maybe something like this: https://www.steadygarage.com/store/c...da-grom-125-sf

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    I saved my stock exhaust just in case I may need it later.
    Grom 2018 Modifications:
    Yoshimura RS-2

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    Quote Originally Posted by stevemcc0372 View Post
    isnt the muffler still a slip on? If so then an aftermarket exhaust header part should still fit and could still use the OEM muffler???
    or maybe something like this: https://www.steadygarage.com/store/c...da-grom-125-sf
    Not sure if you're talking OG or SF. The SF's mufflers aren't slip on. They're welded onto the cats. I simply cut it off and run the cat with no pipe.

    Going back to OEM exhaust-rzl9rgc.jpg
    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
    TST Rear Fender Eliminator
    TST Taillight +Signal Lights
    TST Front Signal Lights
    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

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    Quote Originally Posted by john2018 View Post
    I saved my stock exhaust just in case I may need it later.
    Do this to it.
    You'll love it.

    Going back to OEM exhaust-uf01ukz.jpg
    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
    TST Rear Fender Eliminator
    TST Taillight +Signal Lights
    TST Front Signal Lights
    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

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    Quote Originally Posted by tooter View Post
    Do this to it.
    You'll love it.

    Click image for larger version. 

Name:	UF01UKZ.jpg 
Views:	23 
Size:	3.17 MB 
ID:	79322
    Thanks! That looks very nice.
    Grom 2018 Modifications:
    Yoshimura RS-2

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    Quote Originally Posted by john2018 View Post
    Thanks! That looks very nice.
    This is how it sounds open with no muffler or pipe.

    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
    TST Rear Fender Eliminator
    TST Taillight +Signal Lights
    TST Front Signal Lights
    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

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    Quote Originally Posted by tooter View Post
    This is how it sounds open with no muffler or pipe.

    I wonder if anyone can put a larger I/D pipe on the front part of the unit that mounts to the exhaust part of the head just to get a better flow of exhaust gas to the CAT and also mounting a bung for the WB sensor or A/F sensor, and of course you would DIY port match the I/D hole size with the exhaust port of the head by doing a little dermal.
    That is the right amount of noise I want on my grom.

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    Quote Originally Posted by CiscoSanJose View Post
    I wonder if anyone can put a larger I/D pipe on the front part of the unit that mounts to the exhaust part of the head just to get a better flow of exhaust gas to the CAT and also mounting a bung for the WB sensor or A/F sensor, and of course you would DIY port match the I/D hole size with the exhaust port of the head by doing a little dermal.
    That is the right amount of noise I want on my grom.
    You likely could install a larger head pipe, but it would require punching a larger hole into the cat and some welding. I'm not willing to go that far so I simply run it as it is. The engine actually runs very well with it and the gas mileage is stellar (139.0 mpg).

    I'm feeling noisy today so I'm putting the TOCE back on...

    Going back to OEM exhaust-r4lpqkf.jpg
    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
    TST Rear Fender Eliminator
    TST Taillight +Signal Lights
    TST Front Signal Lights
    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

  10. #29
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    Quote Originally Posted by tooter View Post
    Not sure if you're talking OG or SF. The SF's mufflers aren't slip on. They're welded onto the cats. I simply cut it off and run the cat with no pipe.

    Click image for larger version. 

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    Ohhh ok. wasnt sure. i have an OG and a friend has the SF but he has an aftermarket exhaust. Wasnt sure how the OEM exhaust was.

  11. #30
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    You could likely get your friend's stock SF exhaust for next to nothing if you want something cheap and quiet but with just a little more sound and performance. Most guys throw them away once they get an aftermarket exhaust.
    2018 GROM:
    TOCE Dual Exhaust
    Yuminashi ECU
    TST Rear Fender Eliminator
    TST Taillight +Signal Lights
    TST Front Signal Lights
    Dinger Built Extra Long Intake
    Honda Monkey Rear Sets
    Honda Monkey Front Fender
    Honda Monkey Fork Guards
    Honda Black Plastics
    G Craft Rear Rack
    Cargo Crate

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