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ER Competition Series catless downpipes for BMW S55 M2 M3 M4 (F80 F82 F87)

ER Competition Series Catless Downpipes — S55

$1,415.00

Evolution Racewerks Competition Series twin downpipes for the S55 — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition. Twin 3.5" mandrel-bent T304 stainless pipes — one per turbo. The largest downpipe section in ER's catalog for a reason: the S55 makes meaningful exhaust flow that the OEM downpipes deliberately restrict for noise compliance.

The S55 and downpipes

The OEM S55 downpipes are restrictive enough that even un-tuned M3/M4 owners commonly report a meaningful difference from a downpipe alone. On Stage 2 and Stage 3 builds, OEM downpipes become the single biggest exhaust restriction — replacing them is standard for any serious F8X tune.

For the F87 M2 Competition specifically

Same engine as the M3/M4 but in a smaller chassis with slightly different exhaust routing. These downpipes drop post-turbo back-pressure to the level the S55's wastegate strategy expects, sharpening throttle response across the rev range.

Catless vs Catted

Catless: race-only, twin 3.5" pipes, no cat material. CEL on stock cal — Esse Werks Stage 2/3 calibrations clear it. Standard choice for track-driven F8X builds.

High-Flow Catted: 200-cell metallic cats in both pipes. CEL-clean on stock cal. Community-observed flow sits close to the catless pipes for street and most track use.

What Evolution Racewerks builds in

  • 100% 304-grade stainless steel construction
  • Mandrel-bent piping — smooth transitions, no flow restrictions at the bends
  • 100% TIG-welded by ER's in-house fabricators
  • Precision CNC-machined flanges (billet 304 stainless)
  • Made in the USA — manufactured in-house at ER's California facility
  • Limited Lifetime Warranty against manufacturing defects

EGT bung included — standard on every Esse Werks ER order

Evolution Racewerks offers the EGT (Exhaust Gas Temperature) sensor bung as an optional add-on on their direct catalog. We include it on every ER downpipe / mid pipe we ship — no upcharge. Comes pre-installed with a 1/8" NPT plug so you don't need to run the EGT sensor immediately. When you're ready to add EGT monitoring to your build (recommended at Stage 2 and above for any sustained-load driving), the bung is already there.

SwainTech White Lightning — our signature coating

When we coat a part, we use one coating: SwainTech White Lightning — a true ceramic thermal barrier applied about 0.015" thick (versus roughly 0.002" for paint-style "ceramic" finishes) and sprayed molten so it bonds to the metal instead of sitting on top. It cuts radiant heat off the exhaust by roughly 35–55%, dropping underhood and intake temperatures, and keeps heat inside the pipe where it sustains exhaust velocity and scavenging. And it's white — a deliberate signature in a market that otherwise all looks the same in black. Select it above.

California restriction

This product is not for sale, installation, or use on licensed vehicles in the State of California. 49-state product. Vehicle Compliance Waiver signed at order intake. International orders ship without restriction.

Install

~3-4 hours at a competent shop. Reuses OEM hardware where applicable. Includes all hardware for complete installation.

Fitment

S55 twin-turbo applications — F80 M3, F82 M4, F83 M4 Convertible, F87 M2 Competition (2018-2021).

This part is the downpipe-side Core of every S55 Stage 2 build. The Stage 2 Kit — S55 packages the matched parts + calibration for 8% under à la carte.

Fits engine S55
Fits chassis F80 · F82 · F83 · F87
Category Exhaust
Manufacturer Evolution Racewerks
Install effort ~3.5 hours
What this is

A Part Recalibration is one focused revision built around the part you just bought. We take logs on your car as it runs now, on your current tune, then make a single full revision so this specific part delivers what it should. Hardware only does its job with a calibration shaped around it.

We bundle that tuning with the part right here, whatever brand the hardware is. If you want a fresh start across all your hardware, a Full Tune is the step up: a new base map, three revisions, and a written report.

This is a bootmod3 calibration. We tune through your own active BM3 license, so you'll need bootmod3 active on your car to load it.

Ships freight from Boca Raton, FL — additional fees may apply at checkout.

Step up to a Full Tune?

You've added a Part Recalibration to more than one part. At that point a complete tune does more for you: a Full Tune lays down a fresh base map and three revisions so all of your new hardware is dialed in together, with a written report at the end. We can roll your recalibrations into one Full Tune for $395 — below our standalone Full Tune, which starts at $495 for a four-cylinder and $595 for a six.

The Full Tune is a bootmod3 calibration — it loads through your active BM3 license, the same one you confirmed for the recalibration.
WHY WE SHIP EVOLUTION RACEWERKS
Cooling is the first thing to run out on a boosted BMW, and Evolution Racewerks builds the charge coolers and intercoolers that buy back the headroom. The bar-and-plate cores carry more thermal mass than the factory units, which is what keeps intake temps from climbing into timing-pull territory on a back-to-back pull. Their charge pipes also delete the factory plastic coupler that is a known weak point under boost. When a Stage 1 or Stage 2 car is heat-soaking on the second hard pull, a competition cooler from Evolution Racewerks is usually the fix that holds the tune's numbers session after session.