Dinan Free Flow Axle-Back Exhaust - BMW 325i/330i | D660-4602

The Dinan Free Flow Axle-Back Exhaust (D660-4602) is a performance-engineered solution for the BMW 325i/330i, designed to provide increased flow for power gains without the excessive noise typically associated with "performance" mufflers. This system features rigid and durable muffler cases manufactured from 20 gauge 304-stainless steel for optimum corrosion resistance.

Internally, the system utilizes Dinan's Tuned Resonance Chamber technology, which provides the optimum balance between maximum power gains and a civilized, yet sporty exhaust note. This component provides a verified gain of +5 HP and +4 LB-FT of torque at 6500 RPM (when used with software) and is substantially lighter than the stock muffler, weighing in at just over 17 lbs. compared to the stock system's 28 lbs.

Features:

• Verifiable Power Gains: Delivers an increase of +5 HP and +4 LB-FT of torque at 6500 RPM (with software).

• Acoustic Precision: Utilizes Tuned Resonance Chamber technology and drone abatement to provide a sporty sound while reducing cabin resonance.

• Superior Material & Construction: Built from 100% 304 stainless steel construction (20 gauge) for optimum corrosion resistance.

• Optimized Weight: Provides a substantial 11 lbs. weight reduction (17 lbs. vs. 28 lbs. stock).

• Aesthetic Excellence: Finishes with dual 2.5-inch polished stainless steel exhaust tips that provide a tasteful performance look.

• Fitment Integrity: Uses the factory brackets and hangers for a guaranteed, factory-like fitment.

Product Contains:

• (1) Dinan Free Flow Axle-Back Muffler Assembly

• (2) Dual 2.5" Polished Stainless Exhaust Tips

• (1) Complete Installation Hardware Kit

Warranty This product is supported by a Manufacturer's Warranty. Note: Manufacturer warranty terms are subject to change.

Installation Instructions