Is your carbon fiber real?

All of our products are made from genuine carbon fiber, not hydro-dipped or vinyl wrapped. We source high-quality materials for each piece, and every product is constructed using industry-standard methods including dry carbon for specific high-performance applications. No corners are cut. No filler materials.

Absolutely not. None of our products are drop shipped. Every item is manufactured at our dedicated facility and shipped to our Chicago-based warehouse, where it undergoes a full inspection and quality control process before being delivered to you. We also offer a selection of custom designs created in-house that are exclusive to Insignist Motorsports — ensuring you're not just getting generic parts passed from one supplier to another.

What’s the difference between dry carbon and regular carbon fiber? Why is dry carbon more expensive?

Dry carbon fiber is lighter, stronger, and significantly more expensive to produce than wet (gloss) carbon. While wet carbon is layered with resin and cured with a gel coat for aesthetics, dry carbon is cured under vacuum pressure in an autoclave — the same process used for Formula 1, aerospace, and race-spec builds. This makes it the premium choice for anyone who prioritizes performance, weight savings, and structural integrity.

Is everything on your site in stock?

All of our products are always available to order, a lot are in stock and others are crafted to order, entering production shortly after your purchase. Because we’re a growing business, we balance warehouse space and customer demand, so some orders may take a little longer to fulfill. That said, we maintain an 'In-Stock & Ready-to-Ship' section, clearly displayed on our homepage and in the navigation menu. You can filter by BMW model and instantly view parts ready to ship from Chicago. We’re transparent with our customers, and you can always check your order status by emailing insignist.com@gmail.com or using the Contact Us page. We typically respond within 24–48 hours.

Yes! We want you to have your item as soon as possible. Items listed in our Chicago warehouse under 'In Stock – Ready to Ship' usually ship within 1–3 business days. If it's crafted to order, it enters our tracked production queue and ships when ready. You can always request updates as your order progresses.

Do you ship to Norway?

Yes! We are a VOEC-registered seller, which means Norwegian customers pay 25% VAT at checkout and avoid surprise fees on delivery.👉 Please note: VOEC applies only to items priced under 3,000 NOK per unit (excluding shipping). Our checkout system currently collects VAT on all items, even those above this threshold. If your order includes a product over 3,000 NOK, we will fully refund the VAT within 24–48 hours to comply with Norwegian regulations. This ensures you only pay what’s required and keeps the process seamless for you.We know this is a small extra step, and we truly appreciate your understanding. It’s part of our commitment to transparency and making your experience as smooth as possible.If you have any questions or concerns, feel free to contact us at insignist.com@gmail.com or through our Contact Us page and we’ll be happy to help!

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Valvetronic BMW F8x M3 / M4 Equal Length Valved Sport Exhaust System

$2,999.00 USD

Sale Sold out

Learn more about our 30-day return policy

BMW F8X M3/M4 Valved Cat-Back Exhaust System

Equal-Length 2.75" Mid-Section with H-Pipe and 3.5" Axle-Back

(T304 Stainless Steel or Grade 5 Titanium)

Overview

The S55 engine powering the BMW F8X M3 and M4 is a performance masterpiece, but its stock exhaust note has long been criticized for excessive rasp and a lack of tonal depth. The Valvetronic Designs Equal-Length Valved Cat-Back is the definitive solution—eliminating the factory harshness and unlocking the rich, balanced sound the S55 was always capable of producing.

This system features a 2.75-inch equal-length mid-section with an H-pipe feeding into a 3.5-inch axle-back. The equal-length design smooths the exhaust tone across the rev range while preserving the aggressive character owners love. With valves open, gases exit freely from the passenger-side tips for maximum volume and performance. With valves closed, flow is routed through our quad-chamber muffler to the driver-side tips for a quieter, more refined note—ideal for daily driving.

No cutting or welding is required—this is a true direct bolt-on system designed to mount to factory points.

Why It Works

- Equal-Length Mid-Section: Balances pulses for a cleaner, smoother tone without losing aggression.

- H-Pipe Design: Improves scavenging for a fuller, more refined sound.-

- Dual-Mode Operation: Raw and loud (open) or subdued and civilized (closed).

Sound & Control

- Valves Open: Aggressive, free-breathing tone with reduced rasp and improved high-rpm clarity.

- Valves Closed: Stock-like sound levels for stealthy driving.

- Electronic Valve Control: Includes standalone controller; OEM integration available.

Construction & Options

- Materials: T304 stainless steel or Grade 5 titanium.

- Weight Savings: –21.7 lb (Stainless) / –49.2 lb (Titanium) vs. OEM.

- Craftsmanship: Precision TIG welds and fully mandrel-bent tubing for maximum flow.

- Tips: Multiple premium finish options to complement your M3 or M4.

Fitment

- 2015–2018 BMW M3 (F80)

- 2015–2020 BMW M4 Coupe (F82)

- 2015–2020 BMW M4 Convertible (F83)

Installation Notes

- Direct bolt-on; no cutting or welding required.

- 100% reversible—return to stock at any time.

-Note for S55 Owners: On free-flow/race downpipes, “2k rpm rasp” may be present during low-rpm shifts. For the most refined tone, we recommend high-flow (200 cell) catalytic converters.