17 King Cat Exhaust

[2013 M1100 Turbo]

Just curious if anyone on here has put an aftermarket exhaust on their King Cat 998 Turbo yet? I am looking at either the GGB Mountain can or the CR Racing straight pipe. I have read around on other forums and hear people say things like "you must get a reflash for a free flowing exhaust to correct for A/F ratios". Both of the exhausts I am looking at say you don't need a reflash on their websites, but then I see stuff like mentioned above. Just checking to see if anyone has some first hand experience with either and what they chose to do.


I emailed Chad at CR Racing and he said during their testing they saw an A/F ratio of 12.2 and down to 11.2 on long pulls.


FWIW, I ran a GGB straight pipe on my M1100 Turbo for a little over a year and it ran amazing.

 

[Prairie Dog]

I got a CR resonator pipe this year but haven’t put it on yet so not sure what it will be like

 

[8secolds]

I have an 18 HC and I would not run a muffler on this sled without a tune. Some say you can some say you cant but the AFR is close to death without a tune. I would get a small tune and muffler as it turns this sled into an animal.

 

[2013 M1100 Turbo]

I have an 18 HC and I would not run a muffler on this sled without a tune. Some say you can some say you cant but the AFR is close to death without a tune. I would get a small tune and muffler as it turns this sled into an animal.

What A/F ratio are you hearing or seeing? From the numbers CR Racing sent me it would be on the rich side.

 

[8secolds]

If you go over to HardCore Sledder and browse the turbo cat forum you will see all the details on this setup. There is a great deal of info on that site for the turbo cats / Sidewinder. I think even Evo has a blurb on the website on the 998 engine with muffler and no tune.

 

[2013 M1100 Turbo]

I ended up ordering a GGB Mountain Can. I emailed GGB and they indicated only 7 to 10 HP gain. They indicated they also tested up to 10,000 feet with no need for a tune. I think I see how they got away with this. If you look at the pipe entering the "muffler" and the pipe leaving the "muffler" there appears to be a choke down at the exit. This keeps more back pressure in the exhaust versus a complete free flow system.

 

[2013 M1100 Turbo]

Well, I got my GGB Mountain Can installed last weekend. From the scale I had it drops around 8-9 pounds over the stock exhaust. It is noticeably louder at idle, but not quite what my M1100 was with a straight pipe. I have not opened it up yet but am leaving for Cooke next week Thursday and will have a chance to see what it sounds like under some WOT.


One thing on changing out exhausts, you should have a ball end T-50 torx bit to get 2 of the bolts out. I did not have one (only a straight T-50 bit) and ended up using a Vice-grips on them. They came out easy enough with the Vice-grips.

 

[nw-sickboy]

I just got the Speedwerx can that you can run without a tune. Are folks ditching the heat shield that mounts on top of the old muffler?

 

[2013 M1100 Turbo]

I just got the Speedwerx can that you can run without a tune. Are folks ditching the heat shield that mounts on top of the old muffler?

I kept the heat shield in place to help keep the turbo heat away from the plastics. Not sure if it helps that much, but I figured what the heck.

 

[BD-Xtreme]

exhaust for 9000 turbo

Here is a good option for you. All stainless steel. 20-25 horsepower gains. Works with stock ecu or aftermarket ecu flashes.
All 16 gauge construction, with top quality welds. Polished and fits great.

http://www.bd-xtreme.com/index.php?id_product=652&controller=product