Product Overview

The MAD Performance downpipe system for the BMW 335i, BMW 135i represents a significant upgrade over restrictive factory exhaust components. Engineered for maximum flow and minimal restriction, this downpipe eliminates the most significant bottleneck in your vehicle’s exhaust system.

By removing the catalytic converter and optimizing exhaust gas velocity, you’ll experience substantial gains in horsepower and torque throughout the powerband. The result is improved throttle response, enhanced turbo spool, and a more aggressive exhaust note that truly reflects your vehicle’s performance potential.

Key Features

• High-flow catless design eliminates OEM catalytic converter restriction
• Precision mandrel-bent tubing maintains consistent internal diameter
• TIG-welded construction for maximum strength and durability
• Smooth internal transitions optimize exhaust gas velocity
• V-band or flanged connections for secure, leak-free installation
• Specifically engineered for N55 engine applications
• Designed and tested specifically for BMW 335i, BMW 135i

Performance Benefits

• Horsepower Gains: Unlock 15-30+ horsepower depending on vehicle and tuning
• Improved Turbo Response: Reduced backpressure allows turbos to spool faster
• Enhanced Sound: Aggressive exhaust note with turbo spooling clearly audible
• Foundation for Tuning: Essential for stage 2+ tuning modifications
• Reduced EGT: Lower exhaust gas temperatures improve reliability

Vehicle Compatibility

This MAD Performance product is specifically engineered for:

• BMW 135i
• BMW 335i

Engine Applications:

• N55 Engine

Note: Please verify specific model year compatibility with your vehicle. Contact Kies Motorsports with your VIN or vehicle details if you need assistance determining fitment.

Quality & Construction

MAD Performance downpipes are constructed using premium T304 stainless steel with precision TIG welding throughout. Each component undergoes strict quality control to ensure proper fitment and leak-free operation.

The mandrel-bent tubing maintains consistent internal diameter for optimal flow characteristics, while laser-cut flanges ensure perfect mating with factory and aftermarket exhaust components. Every downpipe is pressure tested before shipping to guarantee quality.

Why Choose Kies Motorsports?

At Kies Motorsports, we specialize in premium BMW and Porsche performance parts. As authorized dealers of top brands like MAD Performance, we provide:

• Expert Technical Support – Our team has hands-on experience with these exact products
• Authentic Products – 100% genuine MAD Performance parts, never replicas
• Fast Shipping – Quick delivery to get you back on the road or track
• Customer Satisfaction – Dedicated support before and after your purchase

About MAD Performance

MAD Performance specializes in high-quality aftermarket performance parts for BMW vehicles. Known for precision engineering and rigorous testing, MAD products deliver real-world performance gains while maintaining reliability. Each component is designed to exceed OEM specifications and provide enthusiasts with the quality they demand.