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Vehicle Info NeededDINANPART NUMBER: 421-D660-3940
D660-3940 Dinan Free Flow Axle-Back Exhaust, 1997-2003 BMW 540i
$96795
Ships on Sep 14, 2026
Lowest Price GuaranteeDinan Free Flow Axle-Back Exhaust1997-2003 BMW 540i Stainless Steel Polished Tips w/ Standard Bumper
Dinan D660-3940 Features:
Dinan's Free Flow Axle-Back Exhaust for the 540i provides power gains without the excessive noise associated with typical 'performance' mufflers. The Dinan exhausts feature rigid and durable muffler cases manufactured from 20 gauge 304 stainless steel for optimum corrosion resistance. Internally, the systems feature Dinan's Tuned Resonance Chamber Technology providing the optimum balance between maximum power gains and a civilized, yet sporty exhaust note. The Dinan exhausts also provide substantial weight reduction compared to the stock mufflers. The mufflers weigh in at 18.5 lbs. compared to the stock systems at 34 lbs. Dual 3-inch diameter polished stainless steel exhaust tips give the cars a tasteful performance look as well.Part TypeExhaust System
BrandDINAN
Package Height12.25
Package Width25.25
Package Length46.5
Weight28.84 PG
Part CategoryPerformance Parts
Estimated Horse Power Gain7 @ 6500 RPM
Maximum Torque (Ft-Lb)6 @ 6500 RPM
Part FitmentSemi Universal
Vendor Part NumberD660-3940
Package Qty1
Package TypeEA
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