Milltek Large Bore Downpipe | Toyota Corolla GR Corolla 1.6 Turbo

Description

Milltek Large Bore Downpipe with integrated Hi-Flow Sports Cat combines increased gas flow with optimized catalyst efficiency. Fabricated with larger-diameter tubing than OEM equivalents, this system routes exhaust more efficiently from the engine while maintaining emissions compliance through the high-flow cat element. Direct fit for use with OE secondary cat-back systems; no modification required. Constructed from T304L stainless steel, mandrel-bent throughout for consistent internal diameter and zero turbulence. Hand-finished welds and precision CNC-formed sections ensure OEM+ fitment using factory hangers and mounting points. Requires Stage 2 ECU remap to unlock full performance potential. Fitment & Compatibility: • Fits 6-speed manual transmission models only, not the 8-speed automatic (GR-DAT) • Works exclusively with OE secondary cat-back exhaust systems • Replaces restrictive factory downpipe • Maintains emissions-legal operation with hi-flow catalyst • ECU tuning required for optimal resultsEngineered for precise resonance control and tailored exhaust note character. Dyno-proven power gains without sacrificing streetability or reliability. Designed and manufactured in the UK with 40+ years of performance exhaust heritage. Tested at the Nurburgring.

Fits 5 vehicles including:

• 2023 Toyota GR Corolla— GR Corolla 1.6 Turbo > 2023 and later
• 2024 Toyota GR Corolla— GR Corolla 1.6 Turbo > 2023 and later
• 2025 Toyota GR Corolla— GR Corolla 1.6 Turbo > 2023 and later
• 2026 Toyota GR Corolla— GR Corolla 1.6 Turbo > 2023 and later
• 2027 Toyota GR Corolla— GR Corolla 1.6 Turbo > 2023 and later