Speed Logic 4" Catless Race Downpipe – BMW 228i / 320i / 328i / 428i (N20)

OVERVIEW

A downpipe is one of the best price-to-performance modifications available for the N20 engine. The Speed Logic race catless downpipe removes the restriction built into the OEM downpipe so the turbo spools faster and makes more power, and it gives the car a deeper, louder exhaust note along with the turbo sounds the factory system muffles. Depending on tuning, supporting modifications and fueling, the gain runs from roughly 20 to 25 horsepower. Every Speed Logic downpipe is built from 304 stainless, 100% TIG welded with all welds backpurged in argon, and carries a lifetime warranty.

SPECS

• 4" stainless steel race catless downpipe
• Full 304 grade stainless steel construction
• Adds 20-25+ horsepower and 25-30+ lb-ft of torque with adequate tuning
• Removes the restriction built into the factory exhaust system
• Delivers turbo sounds and a deeper exhaust note
• 100% TIG welded
• All welds fully backpurged with 100% argon
• Welds are not ground or polished
• Fits N20 engines only - does not fit N26 (SULEV) engines
• Catless - off-road use only, not available for sale in California or other emissions-testing states
• Includes a Speed Logic LIFETIME warranty

PARTS INCLUDED

• (1) Speed Logic 4" catless race downpipe

TECH RESOURCES

Additional Parts Required

• A tune is required. This is a catless downpipe, and without supporting software the car will log catalyst efficiency faults and throw a check engine light. Speed Logic supplies Bootmod3 for the N20 engine.
• Exhaust gaskets and downpipe hardware if yours are not reusable - factory fasteners are often seized or corroded on cars of this age.

Installation

• Our team is available to answer fitment questions, and installation is available at our Southern California facility - Request an Install Appointment.

Notes

• *NOTE: Speed Logic Downpipes are for OFFROAD USE ONLY and not available for sale in California and other states with emissions testing.
• This downpipe does not fit N26-equipped cars.

VEHICLE APPLICATIONS