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04-01-2026LAST POST
I will say the install was a pain. Installer had to remove the entire rear bumper…he said it was one of the most convoluted installs he has done. Assume it would be same or similar on an X5.
Can’t hear it inside the cabin like I can hear the exhaust in my M2, but to be expected given the insulation difference between the two.
Definitely worlds apart from my X5 50e 😂
Once I called Valvetronic directly they were Very understanding and helpful in resolving the problem. I was told I received the second exhaust that was manufactured so that may have been why I had an issue.
Overall I’m very happy with how it looks and sounds now.
Supersized wroteI’d recommend adding some catless secondary downpipes as well. With the valves closed you won’t hear much of a difference. But with them open and when you get on it, it will put a smile on your face.I meant to respond earlier and say thanks for the responses, and feedback - ive decided to put mine on and its being installed today. Will give feedback once its done
With the windows up and relaxed driving you won’t hear much of a difference. The sound insulation is really good in this car.
ive attached a couple pictures, one is a box of left over parts (not sure what these are all about) and then the fitment of the two sets - you can see one side has an apparent larger gap between outlets.
I do have the carbon VT tips if anyone is looking for some, let me know.
my understanding on the catless DP's is they throw CELs - theres a couple threads ill have to read up on, maybe there is a set that doesnt throw CEL's - would i expect the same sounds with valves closed and then even more smiles (fuel) with valves open?
Supersized wroteGlad to hear it's putting a smile on your face. I've had the same problem with low MPG after installation as my foot has gotten heavier so I can hear that beautiful sound.yes, got it installed, not much difference with valves closed, a little louder at low rpm load (maybe that is what someone referred to as drone) - open is sounds good, does put a smile on my face and have used considerable more fuel since install.
ive attached a couple pictures, one is a box of left over parts (not sure what these are all about) and then the fitment of the two sets - you can see one side has an apparent larger gap between outlets.
I do have the carbon VT tips if anyone is looking for some, let me know.
my understanding on the catless DP's is they throw CELs - theres a couple threads ill have to read up on, maybe there is a set that doesnt throw CEL's - would i expect the same sounds with valves closed and then even more smiles (fuel) with valves open?
Replacing the secondary downpipes with catless downpipes will NOT throw any CELs. Its the primary downpipes that you have to be careful when replacing. I've run the redstar catless secondary downpipes for a few months now with no issues as have many others on here. There are no sensors for the secondary downpipes.
Ben at RG Sport has been testing some high performance primary catted downpipes from Evolution Racewerks for a few months and I plan on checking with him down the road to see if he encountered any issues.
1STRS wroteTry Secondary Downpipes first before a full exhaust. Evolution Raceworks or Red Star. Simple job to replace too. Will give a better sound than just the Resonator delete.I was thinking about this exhaust. I just cut the resonator off and hate the sound (may reinstall). Can anyone compare the sound to a resonator delete?
Tobster3 wroteI agree with Tobster3. But I’d also recommend you install a valve controller as well. There are several brands out there. You can get a good one for just over $200.Try Secondary Downpipes first before a full exhaust. Evolution Raceworks or Red Star. Simple job to replace too. Will give a better sound than just the Resonator delete.
K9-44 wroteAnyone have a video of just catless secondary DP and the valves open?I agree with Tobster3. But I’d also recommend you install a valve controller as well. There are several brands out there. You can get a good one for just over $200.
Supersized wroteTurbo spool maybe? Can't hear it with valves open because exhaust sound is loud, but with closed can hear it now. Is it only wot?Anyone else have a big sucking sound when valves are closed and WOT - could be air but sounds more like vacuum below my feet. Doesn’t make that sound with Valves open.
Supersized wroteI had a shop install mine so I can’t be 100% sure. But I can tell you that they didn’t charge me for any new gaskets. So either they reused the ones that were on the stock exhaust or the downpipes came with them.got my redstar 2ndary downpipes in the mail, but didnt come with any gaskets - based on this diagram i am assuming i need #6 and #9 - BMW wants 400$ for these 4 gaskets - does that make sense?
I’d call Redstar and ask them if it’s supposed to come with gaskets or if you can just reuse the stock gaskets.
K9-44 wroteYou should be able to reuse the same sticker gaskets.I had a shop install mine so I can’t be 100% sure. But I can tell you that they didn’t charge me for any new gaskets. So either they reused the ones that were on the stock exhaust or the downpipes came with them.
I’d call Redstar and ask them if it’s supposed to come with gaskets or if you can just reuse the stock gaskets.
Curious how the downpipes and valve control compares to their muffler kits (with and w/o DPs). anyone down either of those configurations?
