Does a 4 into 1 pipe sound better?

[Coopz]

My K2 has a nice custom 4-1 pipe but I've been thinking about converting it back to the original 4-2 configuration. Not sure if a Delkevic sysyem or another custom pipe but on a ride last weekend 2 motorcycles 'elders' said I should stick with a 4-1 setup as 'they always sound better'.
 I just want the twin pipes as they look good but I don't want to take away my bikes nice exhaust note.

[Andre]

What you want is "eine eierlegende Wollmilchsau"!    Translation: Egg-laying-wool-milk-pig". Closest you can get to that is manipulating the original 4-2. Instructions are here how to do this:

https://gsx1400owners.org/forum/index.php?topic=1924.0

https://gsx1400owners.org/forum/index.php?topic=7020.msg93133#msg93133

[Hooli]

Define 'better'.

If you want to pretend to be a screaming spurtsbike then a 4 into 1 is better for that, if you want it to sound like a big grumbly monster then 4 into 2 is better.

Personally I prefer the sound of a 4 into 2 with nice cans on, it looks better too. I'm not changing the full Akra on my 14 though as that sounds good too.

[Andre]

Guy in German forum made himself a 4-2 Akra. Looks great. Don't know how it sounds or performs; I imagine both good.

[KiwiCol]

Plus one for the 4-2 config with Delkevic 30cm (or shorter) carbon cans (or SS 30's)  That will give you the sound & look you're after. & I'm old too.  

[grog]

Forgot about exhausts being in the can of worms department. Im a tri oval fan, 4-2 or 4-1, end baffle out, both sound deep,rumbly and not too loud. Ive tried 4 cans on mine and definitely a bit of mid range boost with Yoshi.IMO

[Tony Nitrous]

My Bandit, GSX11, GSX14, GSXR all have 4-1's.

When I find the right pipe at the right price my B-King and Busa's will get 4-1's too.

Much prefer the sound, look and weight saving.

Personal taste.

[grog]

A Busa with Dual tri Oval , followed for 10 mins, sure sounded good to me, he was applying revs as necessary.

[Tony Nitrous]

A Busa with Dual tri Oval , followed for 10 mins, sure sounded good to me, he was applying revs as necessary.

Yeah, had twin Tri-Ovals on my 04 and twin Ovals on my 02.



Got twin Ovals on my naked Busa and twin carbon Ovals on my 11 Busa.

They are a quick easy fix to remove the stock cans, although the gains are minimal.
(We ran 2 near identical B-Kings back to back on the dyno, one stock, one with expensive Yoshi cans) both had good A/F readings. The stock one made 1.5hp more, so pretty much the same.

I won't rule out twin cans in the future, but the 4-1, or on a Busa 4-2-1 has a lot more appeal to me.

I love the howl of my GSX14's Yoshimura Cyclone full system.

[Kiwifruit]

Grog, did taking the baffle out make any difference at all to its performance. I've a Tri Oval with baffle on mine, it does sound a bit tame.

[grog]

Col, no difference performance but way better sound,much deeper than other three i have.Make sure you plug up bolt/ rivet hole or it will whistle.Just a happy bike i guess, whistling away. 😂

[seth]

My 4-1 stubby akroprovic sounds fantastic if a bit loud 

[Tally]

Remus revolution 4-1 on mine , a nice crisp rasp with baffles out , bit muted when they're in but that's  just for the mot .

[GSXKING]

Mine came with 4-1 Yoshimura system. Muffler got damaged after a crash in 2007. Kept the headers and adapted new muffler.
I bought a Pipemasters muffler (local guy in Brisbane) oval stainless which gave better performance with more back pressure. Easy to clean and looks as good as the day it went on.
The note is pleasant without drawing attention from Police. 🤞🤞

[Tony Nitrous]

My 4-1 stubby akroprovic sounds fantastic if a bit loud 

I've lways been a self confessed Yoshi fan boi. I probably have 8 or 10 Yoshi cans and full systems around the place, but I just can't find any love for their stuff for new bikes.

They have changed a lot of the cans, the link pipes look awkward and the heat shields look very much like an afterthought.

I've never owned an Akra but that may change. They look a lot nicer than the current Yoshi full systems for the Gen-3 and offer great results without being stupid loud like the Brocks pipes.