Unlock the full potential of your B58-powered BMW with this 5-Inch Heat-Shielded Catless Downpipe. Designed to replace the restrictive factory downpipe, it allows exhaust gases to flow more freely, helping the turbocharger operate more efficiently whilst improving overall engine response.
Manufactured from high-grade stainless steel and wrapped in a heat-resistant shield, this downpipe helps reduce under-bonnet temperatures whilst delivering a noticeably louder and more aggressive exhaust note. It also improves turbo spool, throttle response and power delivery, making it one of the most effective performance upgrades available for the B58 platform.
Unlike many aftermarket alternatives, this downpipe features an integrated mounting bracket for improved support and fitment, helping reduce stress on the turbocharger and exhaust system whilst maintaining a secure installation.
Suitable for both stock and hybrid turbo setups, this downpipe is a popular choice for Stage 2 builds and enthusiasts looking to get the most from their BMW.
• Large 5-inch downpipe design
• Direct bolt-on fitment
• High-grade stainless steel construction
• Fully heat-shielded design
• Reduces exhaust back pressure
• Improves exhaust gas flow
• Supports increased horsepower and torque
• Improves turbocharger efficiency
• Faster turbo spool and improved throttle response
• Helps reduce engine bay temperatures
• Deeper, more aggressive exhaust note
• Compatible with stock and hybrid turbo setups
• Ideal for Stage 2 and higher-performance builds
• Exceptional fitment and build quality
•Designed specifically for the BMW B58 platform
• One of the most effective supporting modifications for tuned B58 vehicles
Please Note
• For off-road, motorsport and track use only.
• ECU tuning is recommended following installation.
Included
• 1x 5-Inch Heat-Shielded Catless Downpipe
Installation
Direct bolt-on replacement for the factory downpipe. Professional installation is recommended. ECU tuning is advised to maximise performance benefits and prevent catalyst efficiency fault codes.
Compatible Vehicles
• BMW M140i – F20 / F21
• BMW M240i – F22 / F23
• BMW 340i – F30 / F31
• BMW 440i – F32 / F33 / F36
Compatible with vehicles equipped with the BMW B58 engine.
Please verify your vehicle and engine type before purchasing.
Customer Reviews
Overall rating: 5.0 / 5 from 11 reviews.
When we get out also the OPF , and with this downpipe- the sound is fuelling your soul💯😩💨extremely happy
The cat is very well priced and came in a good time. Was a direct fit.
Only had it on for a few days so cant comment on reliability but looking at the welds and the build quality I'm not concerned about it.
Given the quality of the product and the timely delivery I would definitely buy from B58Bible again
Super Content!!!
Sam est excellent, super réactif aux questions.
L'envoi est ultra-rapide et super bien protégé .
Quand à la pièce , elle est magnifique , super qualité .
Plus qu'à faire le montage , pour entendre ça.
Sinon merci à la France pour les Frais de Douane.'(f..k)
Je recommande l'équipe de "B58BIBLE"
Amicalement.
Fréd
Bought the 5” Decat… Words can not describe how amazing this sounds. The Quality of the product is 10/10 and is a game changer for the sound of your car. Can’t recommend enough!
Amazing quality downpipe for fraction of the price, sounds insane! The lads at b58Bible kept me updated on when my order will arrive, when the downpipe was back in stock I got it next day delivery. Can’t thank them enough.
Yes. We offer Free Nationwide shipping on all of our products.
When will I receive my item?
When we have received your order, you will automatically receive an e-mail confirming your order. Orders are dispatched next day for 24 hour delivery. Allow 72 hours for placing the order for alloys and up to 5 business days for larger items such as fenders or bonnets.
Can I change or return my item?
Our policy lasts 14 days. If 14 days have gone by since your purchase, unfortunately we can’t offer you a refund or exchange. To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.