pipe exhaust muffler interchange or alternative

[Macs80hp440]

Greetings folks,  I'm hoping somebody with much more experience might have figured this out.  I'm wondering what other pipes will interchange (fit) with invaders/intruders.  I thought the John Deere Liquifire sleds would fit, but I'm not sure looking at pictures.

Maybe other sled pipes will fit?  Has anybody tried?

OR - does anyone have a '80s pipe for Invader/Intruder...the one with the extra expansion tank on the end. 

Thank you for the consideration.

[Lloyd (ljm)]

 A Deere one might fit with some modifications. But I think the later Kawasaki pipes are a better pipe.

 I know Kawasaki pipes won't fit in a Deere belly pan, But a Deere one should fit in an Invader pan.

[Gilson435]

I see there is a NOS one on Ebay...

[Vader]

If I take the pipe from my 81 Invader and put it in my 79 Invader, are there any changes in carb tuning to go with the different pipe design?

[rminier]

 1978 and 1979 Invaders...both the 340's and 440's used tuned muffler 39083-3501.
 The 1980 Invader (440 only) changed to the improved 39083-3506 muffler, which was also used in the 1981 440 Invader.
 The 1980 340 Invader continued to use the original 39083-3501.
 The newer 3506 has a bulge on the underside, and was advertised to add 5% more power to the 440...roughly 3 or 3 1/2 HP.

Vader, the jetting for the 440 Invaders remained exactly the same during its 4 year production run, 1978 through 1981, so I'm pretty sure you can interchange the pipes without any worries.

[Vader]

Sounds good, thanks for all the info!

[gixxer6]

4/6 LTD twin pipes will fit, but performance increase is negligible.  Kawasaki made git kit twin pipes, these with porting will make a good improvement.  Aaen makes twin pipes for the invader also. 

[Vader]

In Quebec, we are not allowed to use aftermarket pipes due to noise regulations.  (Only applies to sleds made after 1971)

[Macs80hp440]

Asked and answered.  Thanks for the quick reply.  I found a couple of original pipes nearby home.  But, it is always nice to know alternatives as I hope to keep this Invader running smooth for a long time.