Supersprint & SCZA 2.5" System w/ Mods

[Tbonem3]

The HJS are of good quality, but yes, slip them into the OE bracket.

Good feedback!

[Obioban]

I didn't fully comprehend Slideway's comments - now I get it. You mean this, separate bracket
https://www.ecstuning.com/b-genuine-...h/18207839657/

Correct. 👍🏻

[jbfrancis3]

I didn't fully comprehend Slideway's comments - now I get it. You mean this, separate bracket

https://www.ecstuning.com/b-genuine-bmw-parts/exhaust-mount-hanger-support-priced-each/18207839657/

[jbfrancis3]

Brand new OE exhaust mounts will last a while. There is the OE metal bracket that was not transferred over to those aftermarket mounts. It give the mount a little more structure.

Yes-- those mounts are incomplete.

Ah. FWIW, I'm only seeing a choice of OEM or aftermarket (HJS) these days.

https://www.fcpeuro.com/Parts/?keywords=18201401797

https://www.ecstuning.com/BMW-E46-M3-S54_3.2L/Search/SiteSearch/18201401797/

Unless you all have a different part # that would be helpful for someone else

[Obioban]

Brand new OE exhaust mounts will last a while. There is the OE metal bracket that was not transferred over to those aftermarket mounts. It give the mount a little more structure.

Yes-- those mounts are incomplete.

[Slideways]

Brand new OE exhaust mounts will last a while. There is the OE metal bracket that was not transferred over to those aftermarket mounts. It give the mount a little more structure.

[jbfrancis3]

Nice writeup and impressive skill man.

When you say sec 2 gave a more raw sound, this is with the setup pictured in post 1 with mini resonators and hjs?

I'll add my data once everything is on.

Thanks. I started with unresonated SS sect 2, then I tried adding an x-pipe, then I tried the small resonators, and now I have the SS resonator.

Obviously, less sound absorbing makes for more a dramatic note. I was trying to retain the nice [raw] sounds in the upper RPMs but not have these pockets of buzziness in the lower RPMs. They start and stop at certain RPMs and certain throttle inputs, which I found be more unpleasant than worth for the higher RPM note. I wanted to see if it were possible to dial these out (hence the incremental approach) but I couldn't.

Tbonem3 is right when he recently said that section 2 is where the rasp builds - that's what I found, too. So adding the SS resonator took care of all that but it noticeably quiets everything else, including upper RPMs, down. That's on relative basis, mind - I'm not saying you will end up with a quiet system by doing a resonated SS section 2.

I do have a quiet system, though, due to the SCZA muffler. That section 3 with an SS resonated section 2 is good exhaust setup for emphasizing an airbox.

I never did recordings of the initial setups. That would have been a good idea for this thread! The v-bands are great for this sort of screwing around, and other maintenance.

Lastly, my new OE muffler hangers (HJS brand) have pretty much failed within a year - don't buy! I'm not going to hope for a little more life out of OEM ($50 ea), so I just placed an order for Rogue's
https://www.rogueengineering.com/Rog...lly_p_302.html

[Obioban]

I'm super jealous of the V bands.

[Bimmerchop]

We need a sound clip!

This! Love the Vbands

[BMWahba]

We need a sound clip!

[jet_dogg]

Nice writeup and impressive skill man.

When you say sec 2 gave a more raw sound, this is with the setup pictured in post 1 with mini resonators and hjs?

Thanks for sharing. I had this same setup a few months ago or so and didn't love it due to the sect 2 and as you say, install was a bit tricky/tight. Very interesting to see you add resonators to sect 2 after the fact and the whole vband thing.

Will you be dynoing soon? Will be good to see another s54 with cams/airbox/2.5"

I'll add my data once everything is on.

[jbfrancis3]

More fussing about. Those small bottle style resonators weren't tempering a small hit of rasp around 2-3k RPM. Lots of rasp talk lately on some of the threads but on my setup, it was odd to have that one spot. So $600 later for a new SS section 2 with resonator 🙄 I chopped it out and spliced into the existing system. Nothing like taking the long route.











At the beginning of this project, I wondered if non resonated section 2 would give a more raw sound. It did, slightly, on the rips up to redline but I didn't care for the buzziness. Adding the small bottle style resonators helped, but had the issue noted above. Resonated section 2 turned out to be the way to go for me.

[jbfrancis3]

Thanks for kind words, all. Here's a link for the tips. Really nice pieces, plus the price has come down recently. They are meant to be re-riveted onto the factory section 3 but they happen to be 2.5" OD and then flare to 2.75" (70mm): https://burkhart-engineering.com/en/...6-m3-inkl-csl/

[r4dr]

Those tips look like how they should have come from the factory, really nice.

[Cubieman]

Great work man, all that work will save you time down the road when the exhaust needs to be removed to get to this or that.