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Mercedes-AMG M133 Turbo Upgrade Guide — Stage 4 | A45, CLA45, GLA45
The Mercedes-AMG M133 2.0-litre turbocharged four-cylinder is the engine behind AMG’s compact performance lineup — the A45 (W176), CLA45 (C117), and GLA45 (X156). From the factory, the M133 produces up to 381 HP in its final specification, making it one of the most powerful production 2.0T engines ever built. But with the right turbo upgrade, the M133 is capable of significantly more — well beyond 500 WHP on pump fuel. This guide covers the turbo upgrade path for all M133-equipped models, including the Stage 4 turbo kit and the supporting modifications needed to extract its full potential. Factory M133 Turbo...
Mercedes-AMG M178 Turbo Upgrade Guide — Stage 3 & Stage 4 | AMG GT, GTS, GTR
Mercedes-AMG M177 Turbo Upgrade Guide — Stage 3 & Stage 4 | C63, E63, GLC63, GT63
BMW B58 Downpipe Guide — Catless | 240i, 440i, 540i, 640i & X4 M40i | 3.0T Inline-6 | Power Gains, Sound & Installation
The BMW B58 3.0-liter turbocharged inline-6 is widely regarded as one of the best engines BMW has ever produced. Found in the 240i, 440i, 540i, 640i GT, and X4 M40i, the B58 combines smooth power delivery with remarkable tuning potential. The single most effective bolt-on modification for this platform is replacing the restrictive factory downpipe with a catless unit.This guide covers catless downpipe options across the entire B58 lineup, real-world power gains, exhaust sound changes, fitment, and why an ECU calibration is essential.The B58 3.0T — Platform OverviewThe B58 is BMW's 3.0-liter turbocharged inline-6, the spiritual successor to the legendary...
BMW M5, M6, X5M & X6M Downpipe Guide — Catless | S63 & S63TU 4.4T V8 | F10 F90 F85 F86 | Power Gains, Sound & Installation
The BMW S63 engine family is one of the most capable twin-turbo V8 platforms ever built. From the F10 M5 to the F90 M5 Competition, and from the M6 Grand Coupé to the X5M and X6M, the S63 in its various iterations has powered BMW's most powerful models for over a decade. Upgrading the factory downpipes is the single most effective bolt-on modification across the entire S63 lineup.This guide covers catless downpipe options for every S63-powered BMW, real-world power gains, exhaust sound changes, fitment across all models, and why an ECU calibration is essential.The S63 Engine Family — Platform OverviewThe...