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Ships within 48 hours · Estimated delivery Jul 25 - Jul 30
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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
4.9 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
I usually wear 11.5's, but I buy 1/2 size smaller to accommodate for stretch. Leather relaxes.
Size: 11, Color: Burgundy Polished Full Grain
5 STARS: These shoes are awesome. I keep coming back for more. I have major foot problems, have tried all kinds of shoes, orthotics, and inserts... but believe it or not, these shoes work better than any of that stuff. I wear them daily. I buy lots of them, for home, for church, and I'm getting my first pair of J&M boots today, for winters in Indiana... Brrrr
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Reviewed in the United States on December 18, 2025
★★★★★ 3
Way too narrow
Size: 9.5 Wide, Color: Burgundy Polished Full Grain
I ordered a wide in this shoe, but it was still way too narrow. I had to return them. Otherwise, it looked like a nice quality shoe.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
Penny loafers - best new old style
Size: 10, Color: Burgundy Polished Full Grain
These fit great. Real old school style reborn as original. Comfortable leather and looks great with jeans or dress pants.
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Reviewed in the United States on June 25, 2025
★★★★★ 5
Good quality for a great price
Material Type: Recycled Polyester, Color: Cobalt Blue, Size: Large
Love this fleece, warm, soft, great quality and I love the front pocket to keep hands warm and store stuff You need handy without falling out!
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Reviewed in the United States on April 6, 2026
★★★★★ 5
Warm, Comfortable, and Great Value!!
Material Type: Recycled Polyester, Color: Black Red Buffalo Check, Size: Medium
This fleece is cozy and does a good job keeping warm in cold weather. The material is soft, the fit is comfortable, and it layers well over a shirt. Not heavy-duty outerwear, but perfect for everyday wear and great quality for the price.
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Reviewed in the United States on January 17, 2026