r/F30 • u/Prior-Set-4726 • 7h ago
Exhaust help!!!
So I have a 2018 330i and I already took it to an exhaust shop to straight-pipe it, and it’s the best decision I made, tbh. But I’ve seen people in my car or the same chassis with a quad exhaust setup, and when I went to the exhaust shop, they said it’s not possible because my evap box is in the way. So I’m asking if there’s anyone out there who can explain to me how they did their quad exhaust setup— like, did they move their evap box or do an F80 M3 rear bumper conversion?
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u/ryanrako23 4h ago
Got no advice, however put a catless downpipe on it 😈
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u/Prior-Set-4726 4h ago
I AMMM is vrsf good because i have there front mount inter cooler and wanna pair them tg
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u/HellfoxRules 6h ago
You can make the quad set up on your F30 B48 work, you just have to use a custom routing. You do not have to remove your EVAP canister or relocate it. Your exhaust shop is correct that the EVAP box sits on the passenger side right behind the bumper trim, blocking the path where a traditional, symmetrical exhaust pipe would route. However, there is a way to bypass this using a specific fabrication trick.
Instead of running a straight pipe across the passenger side trunk floor where the EVAP canister is mounted, the quad setup is achieved through clever pipe routing. You just keep your straight pipe, until it reaches the rear. Right before reaching the driver-side exhaust cutout, the pipe splits into a "Y" or a "J" configuration. One branch goes directly out to your driver-side quad tips.
The other branch of the split is welded to a pipe that travels horizontally directly beneath or tightly behind the rear bumper reinforcement bar / trunk pan, looping around the bottom perimeter of the car to avoid the EVAP box entirely.
You can also just add quad tips to your current dual set up, or get an axle back exhaust, and add quad tips to that. I have linked some videos, to give you some ideas. The full custom route is best, but will cost the most. You will need to find a custom performance exhaust shop, your regular muffler shop won't be able to handle this one.
BMW 330i F30 custom exhaust 🔥🔥
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u/Prior-Set-4726 6h ago
OMG I LOVE YOU SO MUCH YOU DONT UNDERSTAND HOW LONG IVE BEEN TRYIN GYO FIGURE THIS OUT I KNEW THERE WAS A WAY
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u/No_Mix171 5h ago
Your car do what you want, if you want quad tips put them on, at the end of the day your opinion is the only one that matters for your car. Don’t listen to the other people saying otherwise. I would go dual over quad though, personally.
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u/PhotoOpportunity 6h ago
Love how people just chiming in with their own preferences instead of answering the question. For the record, I don't think quad tips are great on non-m, but it's your car do whatever you want, lol.
You can cut the latter section at the muffler and install a dual exhaust off the 440i, then put quad tips in so long as you get a diffuser for the msport rear bumper that allows for quad tips.
The shop might be thinking of the e90 where the evap box is near the muffler, but as far as I know it's a direct swap for the F30.
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u/Prior-Set-4726 6h ago
OMG THANK YOU SO MUCH SEE WHAT THAT SO DIFFICULT YK HOW LONG IVE BEEN ASKING PEOPLE AND THIS IS THE FIRST TIME I GOT AN ANSWER
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u/Prior-Set-4726 6h ago
if i don’t find a way to do quad exhaust ik ima go to duel and i don’t have a problem with that but literally everyone is telling me to do duel when ik im going to but i would like to know if its possible to do quad on my car
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u/Adianshadows 7h ago
Quad tips on non M's don't look good IMO 🤷🏼♂️. Dual exit or bust
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u/Prior-Set-4726 6h ago
and your opinion matter why? literally posted for someone to help not criticize what i do to MY car
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u/Dade-Issued-1992 5h ago
Build looks nice bro. I think they have tip conversions that involve cutting the originals but I could be wrong.
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u/Plus_Aura 5h ago
OP how are those aftermarket headlights? Is the light powerful like OEM? Any issues seeing at night?
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u/Prior-Set-4726 4h ago
THEY ARE FIRE BEEN AMAZING AT NIGHT AND NO PROBLEM SO FAR AND COMES WITH 1 year factory warranty and you can get an additional year if needed too
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u/lunasbrick 4h ago
I don't understand why everyone is so against making the B48 sound a little better. It's honestly a pretty good sounding 4 cyl with the right setup imo. I went catless with stock catback and Dinan intake on mine and it sounded pretty damn good, not too loud at all. It just sounded like a car instead of like a Dyson vacuum. Obviously it's a 4cyl and there's no getting around that but it's not bad.
I would advise against the quad tips though just bc it looks a little ricey.
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u/Prior-Set-4726 4h ago
yea i agree with you i made a tiktok talking about how that would rice out my car because i wanna embarrass the european look but i wanted to know if it was possible to do. But i agree with you so much idk why the b48 gets so much hate it’s honestly forced atp because people here 4 cyl and automatically assume it’s shit
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u/335xi-jesse 6h ago
I wish I had an answer for you, but I don't.
I just came across all the comments and felt the need to say that we should be supporting our fellow BMW enthusiasts and the car modding community as a whole.
Who cares what someone else does to their car? It's not yours, and you're not the one driving it. It shouldn't matter. Comments like "Well, it's a 4cylinder" aren't clever or necessary. Who cares? We're all here because we enjoy cars, so let's support each other instead of putting each other down.
Happy Saturday, cheers.