Installed a CSL Airbox 😅
Also finished installing euro headers
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Finally got to installing the new bbk and wheel combo..
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I've finished a charcoal evap system removal/delete. I've posted pictures of an m3 canister and 3 series. On a M3 you will only have 1 line coming from the engine bay. Reg 3 series will have 2. On the M3, it is routed from the evap purge valve to the charcoal canister. I removed the evap purge valve, removed the lines/connections. I also removed the charcoal canister, the canister itself has a vent. That is deleted, the fuel tank also has a vent. That is being retrofitted, with a 5/8 x 3/8 ID hose barb reducer. You then attach 3/8 fuel hose to the barb, make a few loops and place a fuel filter on the end of your new vent hose. :thumbsup: edit, you will have to drop the gas tank to do this mod, correctly and completely. You can then code out the evap pump, that connects to the bottom of the intake manifold. zero emissions issues.Originally posted by Bry5on View Post
Smell and vapor emissions - my car is a daily street car.
The early euro charcoal canister is smaller and lighter though, if someone reading is looking to save space and weight. You’ll need to disable DMTL heater if you’re running a US tune I think but that’s it.
Check it out: https://www.e46fanatics.com/threads/...ebuild.1282073
edit: it just occurred to me that this is one of the reasons the CSL is lighter. No DMTL pump, heater and perhaps a smaller canister.
​Last edited by 332; 09-21-2026, 07:30 PM.
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Smell and vapor emissions - my car is a daily street car.Originally posted by 332 View Post
Why haven't you deleted the charcoal canister yet? If you are doing all of this?
The early euro charcoal canister is smaller and lighter though, if someone reading is looking to save space and weight. You’ll need to disable DMTL heater if you’re running a US tune I think but that’s it.
Check it out: https://www.e46fanatics.com/threads/...ebuild.1282073
edit: it just occurred to me that this is one of the reasons the CSL is lighter. No DMTL pump, heater and perhaps a smaller canister.Last edited by Bry5on; 09-21-2026, 06:47 PM.
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Ha, about 12lbs. Maybe a little less on an M3 since the trunk doesn't have a spare tub. It's a good deal of effort to be sure though!
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you guys keep hurting my wallet smh (just ordered some E86 brace parts from bigjae46 and printing your fender braces). What's the weight savings on this (my vert needs to lose every pound possible)?
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I recently moved to the Portland area and attended my first BMW CCA Oregon Chapter meet up and got to park in "history of the M3" row. It rained the whole time but was still a great time and lots of fantastic enthusiasts.
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Maybe if it was a flat drop in panel, I don't need the impression. The Turtle Lab aluminum panel is 3lbs @ $115, that is pretty hard to beat.
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If you're up for it, bigjae46 has a mold and can make carbon trunk floors as well @ 3.5lbOriginally posted by 332 View Post
Got the HARD motorsport E46 Dash block off panels installed today.
Removed the last bit of the sound deadening from the trunk area, to prep it for Turtle Labs spare tire well and battery delete. (sedan) Heat gun, acetone is the way! If you are curious why the spare tire well is smashed in, I had to clearance it to fit Hotckhis sway bars. Stock M3 bars will clear the spare tire well, Hotchkis wont!

My car is the guinea pig:
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Got the HARD motorsport E46 Dash block off panels installed today.
Removed the last bit of the sound deadening from the trunk area, to prep it for Turtle Labs spare tire well and battery delete. (sedan) Heat gun, acetone is the way! If you are curious why the spare tire well is smashed in, I had to clearance it to fit Hotckhis sway bars. Stock M3 bars will clear the spare tire well, Hotchkis wont!
Last edited by 332; 09-15-2026, 09:18 AM.
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After driving the car for a few days I can say the differences are very subtle, nothing dramatic. The butt dyno can feel a little more pep, but again its super subtle. I'm euro headers, euro section 1, stock section 2, and stock suitcase muffler. I can also say its perhaps a little smoother through the RPM range after application of the euro tune.Originally posted by Will View Post
Thanks for posting the detailed steps! Would be interesting to see what your impressions are before and after the updated program/tune.
I do like the rasp better under the euro setup but that is subjective.
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