[JackMK]

Gonna be getting my ecu unlocked soon and wanted to finalize some things before. What catless downpipe do I go with? And can someone sort of explain the different BM3 maps to me. More specially the flex fuel maps

[Its.Wiser]

I went with the VRSF downpipe, its the best bang for your buck
https://www.vr-speed.com/vrsf-b58-do...0-g22-g26.html

[B58-M340iX]

I've had the 91, 93 (stage 1/stage2), e30, and e50 tunes from BM3. All are great. There were a couple of kinks with the multimaps, but they are working those out. I have a VRSF DP installed.

[JackMK]

Originally Posted by B58-M340iX

I've had the 91, 93 (stage 1/stage2), e30, and e50 tunes from BM3. All are great. There were a couple of kinks with the multimaps, but they are working those out. I have a VRSF DP installed.

On the VSRF website, is the catless dp called the track one

[Info@mad-us.com]

Our Black Friday sale is running for another 3 days.

We have 3 different options for you

Catless 4.5 inch - https://mad-us.com/mad-b58-downpipe-...chassis-supra/

Catless 5 inch - https://mad-us.com/mad-2052-mad-bmw-...40-m440-supra/

4.5 inch Catted - https://mad-us.com/mad-b58-4.5-catte...chassis-supra/

[JackMK]

What’s the difference in the sizes

[Jnasratyar]

Originally Posted by JackMK

What’s the difference in the sizes

Sound, but in the end all catless downpipes are basically the same, so just go with whatever is cheapest. As far as the ots maps go for bm3, you only get one when you purchase the license, but you can purchase the rest of them for another $50. The multi map is the only one that has flex fuel enables, but that requires a flex fuel sensor before that works obviously. I’m in the process of getting my bm3 flex fuel sensor to work with bm3 support this morning, so I can’t speak on the performance of it vs the e50 ots, but the e50 ots is pretty fast. I managed to beat my friends stock g80 from a 40 roll.

[mike@x-ph.com]

Originally Posted by JackMK

What’s the difference in the sizes

The larger the diameter is, the deeper it sounds.

It also flows more air, but with a stock turbo, I doubt you will notice any performance increase.

[JackMK]

Originally Posted by Jnasratyar

Sound, but in the end all catless downpipes are basically the same, so just go with whatever is cheapest. As far as the ots maps go for bm3, you only get one when you purchase the license, but you can purchase the rest of them for another $50. The multi map is the only one that has flex fuel enables, but that requires a flex fuel sensor before that works obviously. I’m in the process of getting my bm3 flex fuel sensor to work with bm3 support this morning, so I can’t speak on the performance of it vs the e50 ots, but the e50 ots is pretty fast. I managed to beat my friends stock g80 from a 40 roll.

Yeah, I ended up getting a dp for $250, got the Flex Fuel kit, and an MST intake. But on the way to get my ecu unlocked, I got hit while at a light from behind so now I gotta get that fixed. But luckily, I'm going to a shop that can fix the bumper, install the parts, and ship my ecu to femto all at once to speed up the process