Overview

Dinan engineers designed the BMW 328i/428i exhaust to improve exhaust flow by reducing back pressure. resulting in increased power output and a great sporty sound that is civilized when you want it to be, and pleasantly aggressive under hard acceleration. Like all Dinan exhausts our 328i/428i Free Flow Axle-Back Exhaust is engineered to reduce low-RPM drone so the cabin of the vehicle is still intimate and not drowned in an excessively loud tone. The system is built with ease in mind and utilizes a simple bolt-on installation with included mounting hardware. It is made from 100% 16-gauge 304 stainless steel and will resist corrosion for years to come. The design features twin 70 mm ceramic black or polished and laser engraved exhaust tips for a tasteful high-performance look that yields a maximum performance gain of 4 horsepower and 3 ft-lbs of torque. The factory computer-controlled exhaust valve is eliminated.

Features: - More Power: +4 HP @ 6600 RPM, + 3 LB-FT @ 6600 RPM - Drone abatement technologies used to reduce cabin resonance - Enjoyably louder, sportier sound - Twin 70mm (2.75") laser engraved, polished or ceramic black exhaust tips - 100% 304 stainless steel construction - Uses the factory brackets and hangers for a factory-like fitment

Specifications

Body Material: T304 Stainless Steel Brand: Dinan Category: Exhaust Clamps Included: Yes Dinan Point Value: 3 Emission Code: 5 Exhaust Tip Quantity: 4 Finish: Brushed Grade Type: Performance Hangers Included: Yes Height: 11 Labor Time (Hours): 1.3 Length: 48 Material: T304 Stainless Steel Max HP Gain: 4 @ 6600 RPM Max Torque (lb-ft) Gain: 3 @ 6600 RPM Muffler Quantity: N/A Pipe Material: T304 Stainless Steel Product Type: Axle-Back Exhaust Sub Category: Exhaust and Tail Pipes Tip Finish: Black Ceramic Coated Weight: 51 Width: 30 UPC: 813725021775 Part Number: D660-0046-BLK