Rvng Gen 1 B58 340i & 440i Midpipe
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Description
⚠️ (THIS PRODUCT IS FOR OFFROAD & RACE USE ONLY)
Not 50-state compliant — may not be legal for street use depending on your state's emissions laws. See our Off-Road Use Disclaimer for full details.
RVNG B58 Performance Midpipe
Unlock the sound your B58 was meant to have with the RVNG Performance Midpipe for Gen 1 B58 BMW 340i and 440i models.
Designed to replace the restrictive factory midpipe section and eliminate the OEM resonators, the RVNG Midpipe delivers a deeper, louder, and more aggressive exhaust note while retaining the factory rear muffler and valve functionality. The result is a substantial increase in sound when you want it without turning the car into something unpleasant to drive every day.
At the center of the system is our 3.4-inch single midpipe, a diameter we selected specifically to provide the best balance between exhaust flow, performance, ground clearance, and proper chassis fitment. Going larger isn’t always better when packaging becomes compromised—the 3.4” design gives the B58 increased exhaust volume and flow while allowing the system to fit cleanly underneath the vehicle.
With the factory valved muffler retained, you can still change the personality of the car depending on the drive mode. Keep things more refined while cruising, then open the valves and let the B58 come alive when you want to hear it.
Features
- 3.4” high-flow single midpipe design
- Removes the factory resonators
- Deeper and more aggressive B58 exhaust tone
- Designed for an optimal balance of flow, performance, and fitment
- Retains the OEM rear muffler and exhaust valve functionality
- Increased volume without requiring a full cat-back exhaust
- Direct-fit design for compatible Gen 1 B58 340i & 440i models
More sound. Better flow. Proper fitment.
The RVNG B58 Performance Midpipe gives the Gen 1 B58 the aggressive exhaust character it should have had from the factory.
Rvng Gen 1 B58 340i & 440i Midpipe
FAQs
Answers to our most common questions below.
How Long Does Shipping Take?
All RVNG items ship within 1-3 days. If an item is out of stock the customer will be notified with the choice of a refund or an estimated timeline of delivery.
Do You Have Exhaust Parts For My Car?
We make a range of performance parts but we do not have something for every car. We choose to specialize in specific markets so we can always ensure we are selling the best products possible. As a small company who designs all new products and stocks all our items its hard to sell something for everyone but as we grow we are always looking to expand our catalog!
Do You Offer In Person Pick-Up & Installs In Cali?
Yes, We are located in Garden Grove in Orange County, California. We invite any of our customers to pick-up in stock items and for any install or car related work.
Will Installing These Parts Void My Factory Warranty?
Aftermarket performance parts can affect your factory warranty on related components under the Magnuson-Moss Warranty Act a dealer must prove the part caused the failure to deny a claim. We recommend speaking with your dealer or tuner. Our parts are precision-engineered to factory tolerances and we stand behind every product with our own Lifetime Warranty against defects and fitment issues.
Do These Parts Require a Tune?
Some parts particularly downpipes, intake kits, and fuel system upgrades strongly benefit from an ECU tune to see full performance gains and to prevent check engine lights. Parts like heat exchangers, oil coolers, and hardware do not require a tune. We recommend reaching out to us or your local tuner before purchasing if you're unsure.
What Is Your Return Policy?
We accept returns within 30 days of delivery on unused, uninstalled, and undamaged items in original packaging. Custom or made-to-order parts are non-returnable. To start a return, contact us at contact@rvngraceworks.com with your order number. Return shipping is the customer's responsibility unless the item arrived damaged or incorrect.
How Do I Know This Will Fit My Car?
Every RVNG product is developed and validated on the specific platforms listed. If your exact build year, model, or configuration isn't listed, contact us before ordering — we'll confirm fitment. We stand behind every part with our Fitment Guarantee: if it doesn't fit as described, we'll make it right.
If you have any questions, we're always welcome to help. We'll get back to you within 24 hours on weekdays.
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Shipping Information
All orders ship within 1-3 business days from our Garden Grove, CA facility.
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Customer Support
We're here to help. Reach out anytime and we'll get back to you within 24 hours on weekdays.
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FAQ's
Check out our FAQ section below for answers to our most common questions.
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Contact Us
Located in Garden Grove, CA. Stop by for pickup or install appointments — we'd love to meet you.