BMW M8 Exhaust: Akrapovic vs Borla ATAK Comparison

A BMW M8 exhaust upgrade is the single most transformative bolt-on you can make to BMW's 617-horsepower flagship — and the two systems worth cross-shopping are the Akrapovic Evolution Line (Titanium) and the Borla ATAK cat-back. Both replace the muted factory system on the 2020–2025 M8 and M8 Competition (chassis codes F91 coupe, F92 convertible, and F93 Gran Coupe), waking up the 4.4-liter twin-turbo S63 V8 with an active-valve sound that the stock GPF-choked exhaust simply cannot match. At our Tampa, FL shop, the M8 is one of the most common S63 platforms on the lift for exhaust work, so we put the flagship titanium system head-to-head with the stainless value champion below.

BMW M8 Exhaust Options at a Glance

The BMW M8 exhaust market splits cleanly into two camps: exotic-grade titanium and heavy-duty stainless. Akrapovic occupies the premium end with a full titanium Evolution Line cat-back that lists at $11,724.92 for the F91/F92 and $11,913.94 for the F93 Gran Coupe. Borla answers with its ATAK cat-back at $3,614.99 (marked down from $4,049.99) for the Gran Coupe — roughly one-third the price of the Akrapovic. A third Akrapovic option, the titanium Evolution link-pipe set ($3,662.30), lets Gran Coupe owners add flow and volume without replacing the entire system. Here is how the lineup compares.

Akrapovic Evolution Line: The Titanium Flagship

The Akrapovic Evolution Line is a full titanium cat-back exhaust that replaces the entire rear section of the BMW M8 and saves 22.5 lb (10.2 kg) over the factory system. Every pipe, muffler, and collector is formed from high-grade lightweight titanium alloy, and the tailpipes are finished in genuine carbon fiber. The system uses a twin-valve central muffler layout — one electronically controlled valve on each side — feeding a cast collector on the link pipe where exhaust gas from both banks of the S63 merges for a fuller, muscle-car-flavored V8 note without cabin drone.

The 22.5 lb weight reduction is the headline number and the reason the Akrapovic commands its price. That is unsprung, rear-biased mass removed from a 4,300–4,500 lb grand tourer, which sharpens turn-in and helps the M8 feel lighter on its feet than the curb weight suggests. The system is plug-and-play with the factory valve wiring, and adding the optional Akrapovic Sound Kit gives you independent control of the exhaust valves so you can switch between a refined cruise mode and a full-open snarl on demand.

Borla ATAK: The Stainless Value Play

The Borla ATAK is a T-304 stainless-steel cat-back that delivers Borla's loudest factory-engineered sound level for roughly one-third the price of the Akrapovic. Built specifically for the 2020–2025 M8 Gran Coupe (F93), it runs a dual 3.5-inch split-rear-exit layout with active valves — a dual 3-inch loud path and a dual 2-inch quiet path — plus a Merge X-Pipe for scavenging and Borla's Polyphonic Harmonizer and SwitchFire technology to tune the tone. It exits through dual 5-inch round carbon-fiber tips with black-anodized centers.

ATAK stands for Acoustically Tuned Applied Kinetics — Borla's most aggressive sound profile. The active-valve design means it opens to a full-volume roar under throttle but closes to a civilized dual 2-inch quiet path at cruise, which is how Borla keeps interior drone out of a car that many owners still use as a daily grand tourer. The T-304 austenitic stainless construction resists corrosion far better than the 409-series steel used in budget systems, and it is backed by Borla's Million-Mile Warranty — a meaningful safety net on a car you plan to keep.

Akrapovic vs Borla: Sound, Weight, and Power

On a turbocharged engine like the S63, a cat-back exhaust is primarily a sound-and-weight upgrade rather than a big power play. Because the twin turbochargers already scrub most of the exhaust backpressure, a cat-back on the M8 typically frees only a modest 5–15 horsepower at the wheels; neither the Akrapovic nor the Borla will transform the 617-hp Competition into a different animal on a dyno sheet. What changes dramatically is character — both systems replace the artificially muffled factory tone with a genuine, valve-controlled V8 voice.

The two systems also have distinct sonic signatures. The titanium Akrapovic leans toward a higher-frequency, metallic V8 rasp with a slightly more European, motorsport-derived edge — titanium simply resonates differently than steel. The Borla ATAK produces a deeper, broader-shouldered American-muscle bark that many owners describe as more menacing at wide-open throttle. Neither is objectively "better"; it comes down to whether you want the exotic titanium timbre or the classic V8 thunder. Both are night-and-day louder than BMW's heavily muffled factory system, which relies on cabin-piped augmentation to fake character the stock exhaust does not actually make.

The deciding factors are therefore weight and budget. The Akrapovic Evolution Line's 22.5 lb of titanium weight savings is real, measurable, and removed from the worst place for mass — the rear overhang — which is why we point track-focused and collector owners toward it. The Borla ATAK gives up that weight advantage but returns nearly all of the auditory drama for about $8,100 less. For most M8 owners who want a louder, more emotional car without exotic-tier spend, that trade is easy to make. The M8's official 0–60 mph time of 3.0 seconds (independent testing has recorded as quick as 2.5 seconds) is unaffected by either — you are buying sound, presence, and, with the Akrapovic, a lighter tail.

Installation is straightforward for either system because both are true cat-back designs that bolt to the factory hangers and reuse the OEM valve-control wiring — no cutting, welding, or ECU tune is required for the exhaust itself. In our Tampa shop, a cat-back swap on the M8 is typically a two-to-three-hour job on a lift, and the car drives away with fully functional active valves that still respond to the drive-mode selector. There is no check-engine light, no lost warranty on unrelated systems, and no break-in procedure beyond letting the titanium or stainless take on its first heat cycle. That bolt-on simplicity is a big part of why a cat-back is the first modification we recommend for a new M8 owner before moving on to tuning or charge-air cooling.

Which BMW M8 Exhaust Fits Your Car?

Fitment on the BMW M8 comes down to body style. The M8 uses three chassis codes: F91 (Coupe), F92 (Convertible), and F93 (Gran Coupe). Coupe and Convertible owners running the S63 should choose the Akrapovic Evolution Line under part S-BM/T/23. Gran Coupe owners have the widest choice: the Akrapovic Evolution Line (S-BM/T/25), the Borla ATAK cat-back (140988CFBA), or — if they already like their factory rear section — the titanium Akrapovic Evolution link-pipe set, which adds flow and volume as a lower-cost step-up.

One important note for owners importing a car or shopping globally: the Akrapovic Evolution Line is not compatible with vehicles fitted with an Otto particulate filter (OPF/GPF). U.S.-market M8s are the target application here, but always confirm your exact configuration before ordering. Our Tampa team can verify fitment against your VIN if you are unsure.

Complete the Build: Breathing and Looks

A BMW M8 exhaust upgrade pairs naturally with two other bolt-ons we install alongside it. The S63's Achilles heel on repeated hard pulls is heat soak, so the CSF Twin Charge-Air-Cooler Set ($2,799, marked down from $2,995) is the smartest complement to a louder exhaust — it replaces the undersized factory air-to-water coolers to keep intake temperatures down and preserve power on hot Florida days. For the rear, the Akrapovic matte carbon-fiber diffuser ($2,150.12) frames the new tailpipes and finishes the look the exhaust starts.