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BMW Axleback Exhaust for BMW 4 Series F33 (2014+)

Axleback exhaust systems generally include what's behind your rear axle. These are among the easiest of exhaust upgrades to install, and give you an instant upgrade in sound.

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Signature Performance Valved Rear Exhaust - Generation 2 - Brushed Ti...

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:16375134

Part#: 11-115

Ships in 3 Business Days

$ 1,139.99 USD

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$ 1,139.99 USD

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True BMW performance, durability, and attractive weight advantages with innovative features place the Active Autowerke BMW F3x 335i exhaust in a class of its own. And now Active Autowerke has developed Gen 2 of this model which has been enhanced to take advantage of the OEM valve system. This system is constructed from 100% Brushed 304-stainless steel and features adjustable brushed Active Autowerke double-walled tips. And now the improved sound becomes more pronounced when the valve is opened by the ECU. Rather than creating a complete exhaust system, Active Autowerke opted for a compact design built in a smaller package to deliver more value. The Active Autowerke F3x 335i Gen 2 BMW Rear Exhaust System provides an increase in horsepower, better sound and appearance making it the choice for the avid BMW enthusiast. The system is a straight-through design providing substantial improvements to gas flow over the factory exhaust. Our innovative muffler can design provides maximum volume with the exhaust valve open for a true sport sound. This exhaust delivers a wide-open sound, a solid 15+hp boost and key gains in the midrange with the valve open while the sound comes out nonintrusive with a rich mellow tone with the valve closed. Just like replacing the BMW factory rear exhaust, the Active Autowerke BMW Performance rear exhaust does it in much the same way, if not better by using a much beefier, heavy-duty TORCA style exhaust clamp. TORCA clamps are known for their strength and sealing capabilities to make that tight seal. Other features like height-adjustable mounting tabs make this exhaust easy to install. Key Features: Large mandrel bent piping for maximum flow Uses factory valve system for maximum exhaust sound Durable, Brushed 100% 304 stainless steel for durability Double-walled signature brushed, black or carbon stainless tips Adjustable Tips with Embossed Active Autowerke Logo Improved power & torque throughout entire RPM band Gains of 12-15 HP over stock configuration Tight seal with use of TORCA style exhaust clamps Height adjustable mounting brackets make installation easy Factory curb weight 27.0 Lbs, Active 335i weighs 22.0 Lbs Fitment for Coupe, Convertible and Sedans Complete illustrated instruction manual Two-year warranty Applications: BMW F30 335i, xi (Sedan) BMW F32 435i, xi (Coupe) BMW F33 435i, xi (Convertible) BMW F36 435i (Coupe)

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BMW Xforce Smartbox Varex Muffler ECU Upgrade Module

affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms

T#:28570834

Part#: VKSB01-ECU-MODUL

Ships in 1 Business Day

Sale - Save 10% $ 399.00

This product was last offered at the strikethrough price on
06-30-2026

$ 359.10 USD

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Qty

Sale - Save 10%

$ 399.00

This product was last offered at the strikethrough price on
06-30-2026

$ 359.10 USD

Add to Wish List

BMW Xforce Smartbox Varex Muffler ECU Upgrade Module is the ideal choice for BMW owners seeking to enhance their vehicle's performance. This innovative module seamlessly integrates with the Varex muffler system, allowing for precise control over exhaust sound and performance. With its easy installation process and versatile functionality, it provides an elevated driving experience for BMW enthusiasts.