The CRT Performance Equal Length Midpipe is engineered for BMW M3 and M4 owners who demand refined acoustics, optimized flow, and motorsport precision. Featuring perfectly balanced, equal-length pipes for both cylinder banks, it delivers a cleaner, smoother exhaust tone reminiscent of true inline-six racing sound.

Unlike the Single Midpipe 4”, which prioritizes maximum flow and a deep, aggressive roar, the Equal Length Midpipe focuses on harmonic resonance and pressure balance — creating a more linear, crisp tone with less drone and perfect daily drivability.

By reducing backpressure and ensuring even gas distribution, it sharpens throttle response and enhances overall engine smoothness without compromising comfort.

Key Features

• Harmonic Exhaust Tone – balanced and refined sound across the RPM range.

• Equal-Length Engineering – synchronized exhaust pulses for smoother flow.

• High-Quality Construction – handcrafted T304 stainless steel, TIG-welded, CNC flanges.

• Plug & Play Installation – perfect OEM fitment, no cutting or welding.

• Improved Engine Response – reduced backpressure and optimized gas dynamics.

• Fully Compatible – fits OEM and aftermarket exhaust systems.

EU Vehicle Information

This midpipe removes factory OPF/GPF filters and is intended for off-road or track use only.
Removal of OPF may cause a Check Engine Light (CEL) or ECU limp mode.
CRT recommends the use of OPF-delete cables or a CAN MIL-delete module to prevent software errors.

Equal Length vs Single Midpipe – Key Differences