Best BMW M8 Exhaust Systems: 2020-2025 Buyer's Guide

A BMW M8 exhaust upgrade is an aftermarket cat-back system that replaces the factory rear section to cut weight, sharpen the twin-turbo S63 V8's voice, and free up the power the stock muffler quietly holds back. The 2020–2025 BMW M8 and M8 Competition run a 4.4L twin-turbocharged V8 making 600 hp in base trim and 617 hp with 553 lb-ft of torque in Competition guise — enough to fire the 4,500-lb Gran Coupe to 60 mph in 3.1 seconds. It is one of the fastest cars BMW has ever built, yet it leaves the factory sounding conservative. At our Tampa, FL shop, the exhaust is the first thing M8 owners ask about, and the right cat-back transforms the character of the car. This guide compares the best BMW M8 exhaust systems by material, sound, weight, fitment, and price.

Why Upgrade the Exhaust on Your BMW M8?

The factory M8 exhaust is heavily muffled and gasoline-particulate-filter restricted, which muffles the S63's character. A performance cat-back does three things: it drops weight, it opens up the sound, and it reduces backpressure for a small power gain. On the twin-turbo S63, cat-back systems typically free a modest 5–15 hp — forced-induction engines respond less to exhaust than a naturally aspirated V8 does — so the real payoff is a deeper, more aggressive tone, crisper throttle response, and meaningful weight savings behind the rear axle. Titanium is the key material here: it is roughly 40% lighter than the factory stainless steel, which pulls unsprung-adjacent mass out of the tail of the car and improves how the M8 rotates.

The other reason M8 owners upgrade is control. Both leading systems are valved: the Akrapovic Evolution Line works with the Akrapovic Sound Kit to switch between quiet and open modes, while the Borla ATAK uses active valves with SwitchFire technology to hold a docile cruise and open to a full roar under throttle. That means you can keep it civil for a Tampa commute and unleash it on a canyon run without a tune or a check-engine light.

Both systems are cat-back designs, meaning they replace everything from the catalytic converters back and leave the factory emissions equipment in place. That keeps installation straightforward — a typical M8 cat-back swap takes our Tampa technicians about two to three hours on a lift, with no cutting or welding required on either the Akrapovic or the Borla. Because the F93 Gran Coupe tips the scales at roughly 4,530 lbs and the F92 Coupe at around 4,300 lbs, every pound you pull out of the rear overhang with a titanium system is felt in how the car changes direction.

Best BMW M8 Exhaust Systems at a Glance

Here are the four BMW M8 exhaust options we recommend, side by side. Match the "Fits" column to your body style first — the F91/F92 coupe and convertible use a different part number than the F93 Gran Coupe.

Akrapovic Evolution Line Titanium Cat-Back: Our Top Pick

The Akrapovic Evolution Line is the best BMW M8 exhaust you can buy, full stop. It is a complete full-titanium cat-back — not a slip-on — built from lightweight titanium alloy with a twin-valve central muffler and carbon-fiber tailpipe tips. Akrapovic's sound engineers tuned it for a deep, muscle-car-flavored V8 note that stays smooth and drone-free at cruise, then hardens into a hard-edged bark when the valves open. Because it is body-specific, there are two part numbers: order the F93 version for the Gran Coupe or the F91/F92 version for the coupe and convertible.

Borla ATAK Cat-Back: The Loud, Value Alternative

The Borla ATAK is the loudest street-legal BMW M8 exhaust and the smart value play for the Gran Coupe. ATAK stands for Aggressive Turn-back Acoustic Technology, and it produces the highest decibel output in Borla's street lineup. Built from T-304 stainless steel, this dual 3.5-inch split-rear-exit system uses active exhaust valves — a dual 3-inch loud path and a dual 2-inch quiet path — plus a Merge X-pipe, Borla's Polyphonic Harmonizer, and SwitchFire technology to eliminate cabin drone. It exits through dual 5-inch round carbon-fiber tips with black-anodized centers and is backed by Borla's Million Mile Warranty. At $3,614.99, it costs roughly a third of the Akrapovic and still delivers a savage soundtrack.

Akrapovic Evolution Link Pipe Set: Go Louder

If you already run the Akrapovic Evolution Line cat-back on a Gran Coupe and want more volume, the Evolution Link Pipe Set is the next step. This titanium link-pipe set replaces a restrictive factory section to increase flow and dial up the sound of the full Akrapovic system. It is an add-on — not a standalone cat-back — and pairs with the Evolution Line to build the loudest, most free-flowing titanium setup for the F93 M8 at $3,662.30.

Fitment: F91 vs F92 vs F93 — Get the Right Part

The single most important step when buying a BMW M8 exhaust is matching the part to your body style. BMW splits the M8 into three chassis codes: the F92 coupe, the F91 convertible, and the F93 Gran Coupe (the four-door). The rear sections differ, so the exhaust part numbers differ too.

• F92 Coupe & F91 Convertible: Use the Akrapovic Evolution Line cat-back part S-BM/T/23.
• F93 Gran Coupe (4-door): Use the Akrapovic Evolution Line cat-back part S-BM/T/25, the Borla ATAK (140988CFBA), or the Akrapovic Evolution Link Pipe Set (E-BM/T/10).

All of these fit both the standard M8 (600 hp) and the M8 Competition (617 hp), since both share the same S63 4.4L twin-turbo V8 and rear layout within a given body style. If you are unsure which chassis you have, our Tampa team can confirm fitment from your VIN before you order.

One more note for buyers: the two Akrapovic part numbers are not interchangeable, and neither are the tip styles. The store versions here ship with carbon-fiber tips, which pair cleanly with the M8's factory carbon exterior trim. Ordering the wrong body-style cat-back is the most common mistake we see on M8 exhaust orders, so double-check S-BM/T/23 (coupe/convertible) against S-BM/T/25 (Gran Coupe) before checkout.

Complete the Build: KW V4 Coilovers

A 617-hp, 4,500-lb super-sedan deserves suspension to match its new voice. The KW Coilover Kit V4 for the M8 F93 is KW's premium, independently adjustable coilover system engineered for the M8's weight and power, giving you ride-height and damping control to sharpen turn-in and plant the rear on corner exit. At $8,774.00 it is a serious upgrade, but pairing it with your new exhaust turns the M8 from a fast GT into a genuine driver's car. It is the most common follow-up purchase our M8 exhaust customers make.