I just got my m2 downpipe but it didn't come with any way to hang it like the stock precat hangs. The clamp that goes around the precat won't fit around my downpipe since my downpipe is 3 inch and it too big for the clamp. When you guys got yours did it come with something to hang the downpipe with? Or am i just not supposed to use any hangers on it?

Also I am removing my airpump and i have all stock pulleys. Which belt size do i need to get rid of the airpump and maintain use of all the rest of my accessories? Thanks for all the help !

 

you don't need to hang it.

 

Don't remove the air pump if you still have a main cat. It will clog fast without the pump. Also, you will obviously not pass emissions without the pump. Finally, some people experience a bad idle without the air pump that cannot be adjusted for without using a stand-alone ecu.

 

no i am removing my main cat and replacing it with a midpipe i just ordered. The car is just sitting right now i am not driving it for the winter. The reason i want to remove my airpump is because i won't need it since i will have no cats and my airpump makes a grinding noise that is annoying. Tell me more about the bad idle? whats the cause of it exactly?

 

wait did you mean a bad idle with the air pump off and the main cat still on?? because im not leaving the cat on....

 

The belt you need is a 29 nch belt with 4 grooves. But, remember 30 is going to be too long and 28 is too short so don't compromise.

I have a HKS downpipe. It has a mounting bracket on it, but it doesnt fit right so I don't have it attached. You don't need it.

 

Are you installing the DP yourself? I have to do mine too, but I'm waiting for the weather to clear up.

 

Dood im my opinion, i say ditch the ******* 7 and get a good car, maybe an actually fast car..... but who knows... all i know is that i have smoked... whats the count u to now? oh yeah about 7 or so 3rd gens.. and my number keeps growin.. i agree they are sweeet *** hell cars. but tunning i give a thumbs down later

 

why are you even on this forum? Do you want people to not like you.

About the DP. It's fairly simple to install. Typically it should take about 3-5 hours without a lift. Just take your time and figure stuff out.

 

Tip on installing dp: make sure everything is lined up nicely before you tighten any bolts down. You should be able to turn the nuts (or bolts if you replace the studs with bolts) by hand a little before they get tight. I forced mine and ended up breaking a stud and making my life difficult.

I have questions about the M2 downpipe: first, does it come with replacement studs (or bolts), second, do the nuts (or whatever it comes with) clear the outide of the pipe? I just installed a no-name dp and had problems with this; just wondered if anyone else had similar problems.

 

Maybe this was the wrong thread...we're talking downpipes here. BTW, 7's are not difficult to tune, like any other car, it just requires attention...and slow?

 

I know what you have smoked too

 

As far as the dp goes it is a relatively simple install, take out the old and put in the new. I took mine off and put it back on within an hours time. Just make sure everything lines up and an extra set of hands to hold it up help tremedously.

 

The M2 should come with replacement studs, which in my opinion you do not need to replace. My Petit DP came with new bolts and studs. Secondly im sure the M2 has the same pipe clearance problem as yours. I know mine did as well. It's easily defeated. If you get the 3 other bolts/studs on before that last one and make sure there really loose. Then you can pull the DP out a little bit and should be able to put that last bolt/stud in place without any problems.

 

The pipe or the bracket doesn't fit right?

 

He must mean the bracket that holds the AirPump line to the DP (by the main cat)??
You dont need it anymore.
Also, you guys should know that there is a bracket that hangs down to hold the stock PreCat up, its by the main cat also, it was keeping me from lining up my DP so I had to remove it.
You will see it just infront of the main cat (kinda above it)

 

The pipe or the bracket doesn't fit right?

 

The bracket mount on the pipe doesnt line up with the bracket mount on the car

 

yeah that is what i am talking about. It did not fit around my 3 inch downpipe, but fits around the stock pre-cat piping....so what your saying is it is ok not to hang it then?

As for the precat removal, it was very easy and all the nuts came off easy, wasnt that hard at all.

Does any body know about bad idle caused by removing the airpump like the guy with one of the first posts said?

 

Part of the air from the air pump is routed into the manifold when the motor idles. If you take away the air pump, the motor will run rich when idling, which may lead to bad idle + stinky exhaust. The stock ECU cannot compensate for this. You will need a programmable unit for that.
-MP

 

I just recently had the M2 Downpipe & Bonez Hi-Flow Cat installed by Rotary Performance. They leave all the stock head shielding out as far as i can see. But I can't help ya about the Idle question.

 

tip on installing the m2 dp: I thought i was going to have to remove the bottom left stud since the nut would not clear the downpipe. It took me forever to realize that the way to do it is put all the nuts on real loose and then lift the downpipe up and then the nut will clear the downpipe, then you can turn it and let the downpipe down slowly. i felt like a dumass once i figured that out

 

sorry but one more question, the airpipe that goes into the main cat... can i just block it off with a rubber cap instead of using a block off plate to where it looks like it attaches to the engine? (i am removing my airpump)
thanks !!

 

I left mine open. Probably should have done something about it. But, I don't think it is a big deal.

 

isnt the m2 dp specially designed so that u dont have to remove the studs and stuff? sounds to me like it would be a pretty easy dp to install...