Remus 545i 550i Single System - In stock
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Originally Posted by s4iscool' post='488467' date='Oct 31 2007, 07:05 PM
i und the meaning of bolt on, and this is not it, esp when you would need a sawzall to cut the stock pipe. The words "bolt on" give the impression that the original part can be unbolted, and the new aftermarket part "bolted" on, easy as that. .....
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Well i tryed putting on a remus muffler that was originally ordered for a 545i... purchased from a forum member (jet190rs).
The piping on a 550i is completely different from a 545i... it starts out oval and then gets rounder where the cut off point would be for the OEM muffler.
The clamp provided with the remus does not fit over the stock piping.
Basically in conclusion the remus muffler is not a "bolt on" for the 550i... welding will be required and by the looks of thing it would actually be a downgrade for the 550i resulting in horsepower loss because the diameter on the remus is smaller then the diameter on the OEM piping.
The piping on a 550i is completely different from a 545i... it starts out oval and then gets rounder where the cut off point would be for the OEM muffler.
The clamp provided with the remus does not fit over the stock piping.
Basically in conclusion the remus muffler is not a "bolt on" for the 550i... welding will be required and by the looks of thing it would actually be a downgrade for the 550i resulting in horsepower loss because the diameter on the remus is smaller then the diameter on the OEM piping.
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Originally Posted by RemusExhaustShop' post='489877' date='Nov 4 2007, 03:39 PM
I'll have to check with Remus AT, they share the same part numbers, weird.
The only way to get this muffler on is to get it welded and make custom clamping.
Thats not the main issue here though... the main issue is losing power since the flow is restricted slightly because of the smaller diameter of the remus piping.
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i dont think one can say for sure that flow is reduced, because the muffler itself may have a more free flowing design. Pipe diameter is overrated. 
Id say its disappointing to see the lack of R&D on the fact that the exhaust doesnt simply fit onto the cut pipe.
Id say its disappointing to see the lack of R&D on the fact that the exhaust doesnt simply fit onto the cut pipe.
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Originally Posted by NY550i' post='489822' date='Nov 4 2007, 10:39 AM
Well i tryed putting on a remus muffler that was originally ordered for a 545i... purchased from a forum member (jet190rs).
The piping on a 550i is completely different from a 545i... it starts out oval and then gets rounder where the cut off point would be for the OEM muffler.
The clamp provided with the remus does not fit over the stock piping.
Basically in conclusion the remus muffler is not a "bolt on" for the 550i... welding will be required and by the looks of thing it would actually be a downgrade for the 550i resulting in horsepower loss because the diameter on the remus is smaller then the diameter on the OEM piping.
The piping on a 550i is completely different from a 545i... it starts out oval and then gets rounder where the cut off point would be for the OEM muffler.
The clamp provided with the remus does not fit over the stock piping.
Basically in conclusion the remus muffler is not a "bolt on" for the 550i... welding will be required and by the looks of thing it would actually be a downgrade for the 550i resulting in horsepower loss because the diameter on the remus is smaller then the diameter on the OEM piping.
Is the Remus used......has it been clamped down before? Sometimes when these pipes have been clamped down before you may need to expand it again before sliding it on. Honestly I don't like the slip-on clamp setups with some exhausts. My old B&B was the same way and it would always leak a bit, so I kept tightening the clamp until it finally cracked. Unless a muffler has a real flange type connection I would rather have it welded on anyways.
As far as pipe diameter and back-pressure goes it may not be such a bad thing for the Remus diameter to be a bit smaller. Most (if not all) free-flow mufflers reduce back pressure and therefore reduce low end torque resulting in a slower acceleration from a stop. That certainly was the case with my B&B and others have mentioned the same with other free flow mufflers. So maybe a slightly smaller pipe diameter would make up for the lower back pressure and help keep the acceleration closer to stock.
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My Ride: Fully Loaded Monaco Blue 550i Sport
Originally Posted by rodybmw' post='490001' date='Nov 4 2007, 09:15 PM
If I remember correctly my 545 also starts out oval and then gets rounder.
Is the Remus used......has it been clamped down before? Sometimes when these pipes have been clamped down before you may need to expand it again before sliding it on. Honestly I don't like the slip-on clamp setups with some exhausts. My old B&B was the same way and it would always leak a bit, so I kept tightening the clamp until it finally cracked. Unless a muffler has a real flange type connection I would rather have it welded on anyways.
As far as pipe diameter and back-pressure goes it may not be such a bad thing for the Remus diameter to be a bit smaller. Most (if not all) free-flow mufflers reduce back pressure and therefore reduce low end torque resulting in a slower acceleration from a stop. That certainly was the case with my B&B and others have mentioned the same with other free flow mufflers. So maybe a slightly smaller pipe diameter would make up for the lower back pressure and help keep the acceleration closer to stock.
Is the Remus used......has it been clamped down before? Sometimes when these pipes have been clamped down before you may need to expand it again before sliding it on. Honestly I don't like the slip-on clamp setups with some exhausts. My old B&B was the same way and it would always leak a bit, so I kept tightening the clamp until it finally cracked. Unless a muffler has a real flange type connection I would rather have it welded on anyways.
As far as pipe diameter and back-pressure goes it may not be such a bad thing for the Remus diameter to be a bit smaller. Most (if not all) free-flow mufflers reduce back pressure and therefore reduce low end torque resulting in a slower acceleration from a stop. That certainly was the case with my B&B and others have mentioned the same with other free flow mufflers. So maybe a slightly smaller pipe diameter would make up for the lower back pressure and help keep the acceleration closer to stock.
Expanding the muffler is not the issue here either... the diameter is clearly smaller then the OEM piping and the clamp was not made for the OEM piping.
I just don't want to lose power... don't really care if i don't gain any power.
The other issue is remus advertised the muffler as a clamp on with no welding required so i took it to a shop that doesn't do welding and wasted my only day off work to get this done... if i was originally told it needed welding i would of planned differently
