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What You Will Spend Tuning a high-end performance car is not one purchase — it is a series of decisions, each with a price tag. The total depends on how far you want to go, which components you prioritize, and whether you want bolt-on gains or a full build. This guide breaks down the real costs for three platforms where owners frequently ask "how much will this cost?" — and where incomplete answers lead to budget surprises halfway through a build. Porsche 992 Turbo / Turbo S The 992 Turbo S is one of the most capable platforms in production....

The Mercedes-AMG 45-series — A45, CLA45, and GLA45 — packs a remarkable amount of performance into a compact package. The M133 2.0-liter turbocharged inline-4 was the most powerful series-production four-cylinder engine in the world when it launched, and it remains one of the most tunable platforms in the AMG lineup. A single downpipe replacement is the highest-impact bolt-on modification you can make to this engine.This guide covers everything you need to know about upgrading the downpipe on your M133-powered AMG: catless versus high-flow catted options, real-world power gains, exhaust sound transformation, fitment across all 45-series models, and why an ECU...

The Lamborghini Aventador is a different beast. Powered by the L539 6.5-litre naturally aspirated V12, the Aventador has no turbochargers — which means no traditional downpipes. But the exhaust modification principle is identical: the factory catalytic converters are the single biggest flow restriction in the exhaust system, and replacing them with high-flow sport cats or catless race pipes is the most impactful bolt-on exhaust modification for the V12. This guide covers the Aventador’s exhaust catalyst section — what many enthusiasts refer to as “race pipes” or “cat-delete pipes.” The Aventador Exhaust System The Aventador’s exhaust system routes V12 exhaust from...

The McLaren 720S is powered by the M840T — a 4.0-litre twin-turbo flat-plane-crank V8 that produces 710 HP from the factory. It is one of the most technologically advanced engines in any production car, and it has significant untapped performance potential. The factory catalytic converters, positioned downstream of each turbocharger, are the single biggest restriction in the exhaust system. Replacing them with performance downpipes is the foundation of serious 720S power builds. The M840T Exhaust Architecture McLaren’s M840T is a bespoke unit — not shared with any other manufacturer. The flat-plane crankshaft delivers an even firing order that naturally produces...

The Mercedes-AMG G63 W463A houses the same M177 4.0-litre twin-turbo V8 found in the C63 — but in a body-on-frame SUV that weighs over 2,500 kg. With 577 HP from the factory, the G63 is absurdly fast for its size. But the factory exhaust system, constrained by emissions compliance and the G-Class’s unique exhaust routing to the distinctive side-exit pipes, leaves meaningful power on the table. Upgrading the downpipes is the single most effective bolt-on modification for unleashing the M177’s full capability in the G-Wagen chassis. The G63 Exhaust Challenge The G63’s exhaust system is unique. The hot-vee M177 engine...