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Ships within 48 hours · Estimated delivery Jul 22 - Jul 27
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Description
Racing Dynamics Catted Downpipe with Heat Shield - BMW B58 2016+ / M240i / 340i / 440i / 540iEliminates the largest restriction in your exhaust. 4 1 2" input flange with 4" mandrel bent downpipe manufactured out of 304 stainless steel, TIG welded with brushed finish. For left hand drive models only! Features: Straight through design allows for maximum power and sound. Straight through tubing section replaces the heavy and restrictive OEM catalytic converters for maximum power and sound Includes flex joint to reduce vibration from the engine
Eliminates the largest restriction in your exhaust. 4 1/2" input flange with 4" mandrel bent downpipe manufactured out of 304 stainless steel, TIG welded with brushed finish. For left hand drive models only!
Features:
- Straight-through design allows for maximum power and sound.
- Straight-through tubing section replaces the heavy and restrictive OEM catalytic converters for maximum power and sound
- Includes flex joint to reduce vibration from the engine and allows alignment during installation
- Improves horsepower and torque significantly. Approximately 25 HP with a tune.
- Catted downpipe has heat shield over its outer surface to better direct the exhaust heat out the exhaust. Heat shield is used to protect surrounding parts, wires, and hoses against radiant heat from the downpipes. Integrated thermal insulation reduces surface temperature up to 70%
- Direct bolt-on replacement for OEM primary catalytic converters
- Less thermal load on the turbocharger
- Reduces turbo lag
These parts are intended for off road or track use only!
This product is sold for off road use only. It is not legal for use on public highways. This product is not for sale or use in California. It is available to our international customers for use within legal limits in their domicile.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 4
Great for the price
They are very nice quality, but the 3ml are a little tight on the vial. This is not necessarily a bad thing, but something to note. The 10ml are a little lose on 10ml, but work great on 30ml hospira bac water
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Reviewed in the United States on February 2, 2026
★★★★★ 3
Some easy, some not
Some fit good, some are a little rough to get on
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Reviewed in the United States on February 4, 2026
★★★★★ 5
Great material
Great product
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Reviewed in the United States on March 4, 2026
★★★★★ 5
Dog toy
Flavor Name: Mixed, Size: 4 Count (10 oz)
Dogs love these
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 16, 2026
★★★★★ 5
Love this brand!
Flavor Name: Mixed, Size: 4 Count (10 oz)
My standard poodle loves these but I cut them up into more manageable sizes. This has become my new “go to” brand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 9, 2026