{"product_id":"dinan-free-flow-axle-back-exhaust-black-tips-bmw-f30-335i-f32-435i","title":"Dinan Free Flow Axle-Back Exhaust Black Tips - BMW F30 335i \/ F32 435i (2012-2016)","description":"\u003cp\u003eThe N55 has a great voice. The factory exhaust just keeps it quiet. You hear more intake whoosh than straight-six, and the valve does its best to make sure the neighbors never know what you drive.\u003c\/p\u003e\n\u003cp\u003eThe Dinan Free Flow Axle-Back Exhaust for the BMW F30 335i and F32 435i lets it sing. It cuts back pressure for a Dinan-tested gain of 6 HP and 5 lb-ft at 6,600 RPM, and it runs a Helmholtz chamber to take the drone out of highway cruising. This version finishes with twin 3.5-inch ceramic black, laser-engraved tips.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow the Dinan Free Flow Axle-Back Exhaust Handles Drone\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eMost louder exhausts are fine at full throttle and tiring at 70 mph. Dinan tuned this one with a Helmholtz chamber that targets low-RPM resonance, so the sound goes from civilized around town to properly aggressive when you lean on it, without a constant hum in the cabin on a long drive.\u003c\/p\u003e\n\u003cp\u003eThe whole system is 16 gauge T304 stainless steel and mounts on the factory brackets and hangers, so it fits like an OEM part. One thing to know: the factory computer-controlled exhaust valve is eliminated, so the system does not switch between quiet and loud modes the way stock does. Dinan part number D660-0045-BLK. Sold by AutoTecknic, an authorized Dinan dealer.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the Dinan Axle-Back Exhaust Street Legal?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. It sits behind the catalytic converters and does not affect emissions. Dinan lists it as legal for sale or use on emissions-controlled vehicles. Local noise rules still apply, as with any aftermarket exhaust.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDinan T304 stainless steel axle-back exhaust with twin 3.5-inch ceramic black tips\u003c\/li\u003e\n  \u003cli\u003eClamps\u003c\/li\u003e\n  \u003cli\u003eHangers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eDinan-tested +6 HP and +5 lb-ft at 6,600 RPM\u003c\/li\u003e\n  \u003cli\u003eHelmholtz chamber reduces low-RPM drone\u003c\/li\u003e\n  \u003cli\u003e100% 16 gauge T304 stainless steel\u003c\/li\u003e\n  \u003cli\u003eTwin 3.5-inch ceramic black, laser-engraved tips\u003c\/li\u003e\n  \u003cli\u003eUses factory brackets and hangers for OEM-style fit\u003c\/li\u003e\n  \u003cli\u003eFactory exhaust valve eliminated\u003c\/li\u003e\n  \u003cli\u003eAbout 1.3 hours to install\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eVehicle Fitment\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eFits the following N55-powered BMW models:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eBMW 3 Series \/ F30 Sedan (2012-2015): 335i\u003c\/li\u003e\n  \u003cli\u003eBMW 4 Series \/ F32 Coupe (2014-2016): 435i\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eInstallation Notes\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is a bolt-on axle-back. With the car on a lift, a shop will have it on in about 1.3 hours. At home on jack stands, give yourself an afternoon and a helper to hold the mufflers.\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003eSafely raise and support the car and let the exhaust cool completely.\u003c\/li\u003e\n  \u003cli\u003eHandle the factory exhaust valve exactly as the Dinan instructions direct, since this system eliminates it.\u003c\/li\u003e\n  \u003cli\u003eLoosen the clamp ahead of the rear mufflers and remove the factory axle-back section from its hangers.\u003c\/li\u003e\n  \u003cli\u003eFit the Dinan axle-back on the factory brackets and hangers, and align the tips in the bumper cutouts.\u003c\/li\u003e\n  \u003cli\u003eTighten all clamps, start the car and check for leaks and rattles.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"Dinan","offers":[{"title":"Default Title","offer_id":51622185697526,"sku":"DNND660-0045-BLK","price":1483.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2674\/6278\/files\/302a76014e2a9722135efc5ccd1d1621L.jpg?v=1789262845","url":"https:\/\/autotecknic.com\/products\/dinan-free-flow-axle-back-exhaust-black-tips-bmw-f30-335i-f32-435i","provider":"AutoTecknic USA","version":"1.0","type":"link"}