Supersprint BMW Z4 E89 20i N20 2.0T Catless Turbo Downpipe (Decat) - AISI 304 Stainless, Flex Joint, O2 Bungs - 987111

Supersprint 987111 BMW Z4 E89 20i N20B20 Catalytic Delete Front Pipe

Unleash genuine performance from your BMW Z4 E89 20i with the Supersprint 987111 catalyst delete front section. This premium 304-grade stainless turbo outlet pipe replaces the restrictive factory converter with a free flowing race pipe that lets the N20 2.0 turbo breathe properly. Expect crisper throttle response, quicker spool, stronger mid‑range torque and a more purposeful soundtrack from your 2.0 petrol turbo when paired with the right calibration.

Why this upgrade

• Maximised gas velocity for lower back pressure and faster turbo response
• Noticeably improved drivability, punchier acceleration and sharper gear‑to‑gear pull
• Perfect foundation for Stage 2 tuning, custom ECU calibration and supporting hardware
• Refined exhaust note with enhanced turbo whistle without unwanted drone when used with quality cat‑back systems

Construction and design

• 304 stainless steel throughout for durability in heat‑cycling and corrosion resistance
• Smooth, straight‑through layout for optimum flow from the turbine outlet
• Integrated flexi section to manage movement and reduce NVH
• Pre‑welded lambda sensor bosses to retain factory sensor positions
• Precision welds and proven Supersprint fitment for easy alignment to OE or performance systems

Compatibility

BMW Z4 E89 20i with the N20 2.0 turbocharged petrol engine. Direct replacement for the original front catalytic section.

Real‑world results

We have installed this Supersprint part on customer Z4 20i builds and the feedback has been excellent for quality, fit, sound and response. It is the key flow component ahead of any rear section upgrade on the N20 platform and a proven enabler for reliable gains when tuned correctly.

Calibration and warning light notes

• Removing the OE catalyst may illuminate the MIL due to post‑cat lambda monitoring
• Common solutions include a lambda spacer or appropriate software calibration as part of a performance remap
• Increased flow may alter requested boost targets, so a proper ECU tune or compatible piggyback is recommended
• For motorsport and off‑road use where permitted only. Check local laws before purchase and installation

Installation and support

Professional fitting is recommended. MJ Modifications offers supply and installation in Warwickshire with careful attention to alignment and sensor routing. Request a quote at info@mjmodifications.co.uk.

Part details

• Brand: Supersprint
• Part number: 987111
• Material: 304 stainless steel with flexi joint and lambda ports

Search tags

BMW Z4 E89 20i N20B20 turbo outlet pipe, Z4 2.0 petrol turbo cat delete, de cat front pipe, test pipe Z4 20i, stainless front section Z4, performance exhaust front pipe, Supersprint 987111 front pipe, BMW Z4 2.0T pre‑cat delete, lambda spacer N20, O2 sensor boss Z4, Stage 2 Z4 N20, ECU remap support, Warwickshire performance exhaust fitting, turbo back upgrade Z4, BMW Z4 20i tuning parts, motorsport exhaust Z4 2.0 turbo.