I have an m4 carbon fiber exhaust iv recently ordered a gp exhaust but i have been reading on cutting an the one i have already and if its pretty easy to do then i will return the gp but i need to know what tools to use i heard u could use a dremmel tool but if anyone has done it before plz give advise or step by step would be greatly appreciated i want the unique sound of the custom exhaust heres a pic of mine

 

I have the same exact exhaust, and managed to cut about 5 inches from it. The process is very simple:

1 - Mark where you want to cut it
2 - Use a drill bit, and drill out the 4 washers (can't remember the name) at the end of the muffler.
3 - Remove end tip off the muffler
4 - Cut the canister AND the inner perforated tube
5 - Slide end tip into the canister but not all the way in. Mark the new holes on the canister
6 - Drill holes
7 - Slide end tip all the way in
8 - Put the pins (can't remember the name ) You can get the "pins" at home depot/lowes

Yes, you can use a dremel, or a sawzall, or a die grinder, etc.

 

POP RIVETS haha

 

YES, "rivets" LOL

Thanks man!

 

If you're asking what too to cut with, I would say a sawzall, a dremel may tangle up with the packing in the muffler. Just go straight through with a sawzall, or take it to a muffle shop and have them do the cut and rivet.

 

A welding shop should be able to do it too. IMHO, the best toll for this job is a chop saw.

 

Here's a couple of write-ups: No.1 & No.2.

 

The best way to do it is a bandsaw i would say. A dremel takes forever and its hard on the dremel. If you got a lame sawzaw like me then it will proly be haggered. I used a hack saw which took some muscle but if you got a good blade its not to bad. After that you need to grind it smooth and even.

 

I cut my stock one down.. haven't had a chance to see how it sounds yet tho.. still painting the tank at the moment.. but here's how it looks

 

Damn thats clean!!! Me like!!