BMW B58 Catless Front Pipe / De‑Cat Downpipe 4.5in (114mm) | Cat Delete Straight Pipe for M140i M240i 340i 440i F20 F22 F30 F32 – High‑Flow Performance Exhaust Upgrade | Stage 2 Supporting Mod

Unlock serious performance with this catless front pipe for BMW’s turbocharged 3.0 straight-six. Featuring a large-bore 114 mm outlet, this de-cat pipe dramatically reduces exhaust restriction, helping the turbocharger build boost quicker for sharper throttle response and a more engaging drive. Built from premium corrosion-resistant steel for long-term reliability and a clean fit on the listed models.

• Free-flow straight-through design that minimises exhaust backpressure for faster boost build
• Large diameter 114 mm outlet for maximum gas flow and improved turbo efficiency
• High quality stainless construction for durability, heat resistance and a refined finish
• Designed for B58-powered BMWs listed below for an OE-style fit

Expect a more responsive feel, stronger mid-range pull and a sportier exhaust tone under load. Our team has fitted this part for customers and feedback has been consistently positive on drivability and quality.

Fitment

• Engine: B58 3.0 turbo
• BMW M140
• BMW M240
• BMW 340
• BMW 440

Installation and support

Professional fitting is recommended. Book installation with MJ Modifications in Warwickshire and get a tailored quote via info@mjmodifications.co.uk.

Why buy from MJ Modifications

• Tried and tested by our team with excellent customer feedback
• Enthusiast support and product guidance
• Quality components chosen for reliability and performance

Also searched as: cat delete pipe, de-cat pipe, catless front pipe, straight pipe front section, high flow exhaust upgrade, performance exhaust front pipe, B58 cat delete, BMW M140 M240 340 440 catless, large bore 114 mm exhaust, turbo back exhaust upgrade, B58 performance parts, BMW tuning parts, stage 2 supporting mod, free flow exhaust, BMW 3.0 turbo exhaust upgrade.

Note: Intended for off-road and motorsport use where applicable. Check local regulations before use on public roads.