60MM Slip on muffler - for my 54MM pipe ? - Wrist Twisters
 
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post #1 of 13 Old 04-09-2015, 01:06 PM Thread Starter
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60MM Slip on muffler - for my 54MM pipe ?

Sorry guys not sure where to ask this....

i'm looking at getting a muffler for 900RR exhaust drop, i found a 60mm ID muffler but im thinking thats too big even clamped down on my 54mm OD intermediate pipe.

What do ya'll think?

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post #2 of 13 Old 04-09-2015, 01:09 PM
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54mm seems small for 900 rr... If I recall, my pipe was 61 and the can (slip-on) was 63mm.

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post #3 of 13 Old 04-09-2015, 01:15 PM Thread Starter
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hmmm strange. yeah the outlet of the 900RR headers i have is 2"

these are the 900RR headers i purchased... i really hope theyre actually 900RR:
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post #4 of 13 Old 04-09-2015, 02:23 PM
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Buy a piece of pipe that will work as a bushing to take up the gap.

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post #5 of 13 Old 04-09-2015, 02:26 PM
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So basically you need a handy dandy 60mm to 54mm adapter eh


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post #6 of 13 Old 04-09-2015, 03:02 PM Thread Starter
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Dandy Handy!

or im hoping an exhaust shop can widen the intermediate pipe by 5-6 mills

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post #7 of 13 Old 04-09-2015, 04:58 PM
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In my local parts store they have a loan a tool program and one of the tools is an expander you place it on and use a wrench to tighten and expand the pipe it's a lot more controlled than a air operated one from a muffler shop. Look into it.

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post #8 of 13 Old 04-09-2015, 07:37 PM
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NAPA has some exhaust pipe reducers sleeves as well but not sure what the inches to mm conversion is and what all sizes they have available.

http://www.napaonline.com/Catalog/Ca...254_0399461881

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post #9 of 13 Old 04-09-2015, 07:37 PM
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So no really, a muffler bushing (not a muffler bearing, lol).

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post #10 of 13 Old 04-21-2015, 09:42 AM Thread Starter
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i need some new muffler bearings for my truck... as well as a new radiator belt and headlight lube.

so i got (received) my new muffler in the mail today... its not quite 60mm as the seller stated, no big deal. I need some advice though. The pipe has a reducer on it that slides into my 900rr intermediate pipe... this doesnt appear ideal.

Im not sure what direction to go in with this? im on the fence of grinding off that weld holding the reducer on and then test fitting my intermediate pipe in the muffler. I'll then expand the intermediate pipe a bit to make it fit in tight. Sound like a plan or anyone have a better idea?
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post #11 of 13 Old 04-21-2015, 10:14 AM
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Mild steel exhaust tubing works nicely for stretching, but stainless (which already starts out pretty thin for exhaust systems) may have a tendency to tear/ crack when you expand it. I tried several times:-/

LDH has a good looking reducer up there, I wonder if it could be had at a good price in a short time? I ended up finding an extra piece of tube, cutting about 1-1/2" for a sleeve to slide in my muffler, and cut a slice in the side until it fit snugly. Added a few tac welds to hold the sleeve in place, shot it with some BBQ grill paint, and have not had an issue for 6-7 years.

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post #12 of 13 Old 04-21-2015, 11:19 AM Thread Starter
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thanks scrat! so after grinding off the weld holding on the reducer i inserted the intermediate pipe into the muffler and its actually a pretty tight fit.

ID of the muffler is 55-56mm (there is a 1/2 wide collar on the ID of the muffler that makes the ID a bit smaller then the pipe would have you think) the OD of the mid-pipe is 54mm

so it fits snug but i can wiggle it a bit. im thinking of asking my neighbor to throw a small bead of weld to seal it. im not sure even sure i'll need the retention springs. what do you guys think?
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post #13 of 13 Old 04-21-2015, 11:49 AM
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Should work like a charm man!

30,000 mile 919 survivor. No plans of stopping the abuse any time soon.
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