aFe 49-36334-P MACH Force-Xp uses 3-inch into 2.5-inch mandrel-bent brushed 304 stainless tubing and a high-flow transverse muffler with a high-temperature black coating. Hand TIG-welded construction, a factory-style valve using the original motor and dual 4-inch polished stainless tips complete the system.
BMW B58 3.0L turbocharged inline-six: 340i/340i xDrive 2016-2018, 340i GT xDrive 2017-2019, and 440i/440i xDrive/440i Gran Coupe/440i xDrive Gran Coupe 2017-2020, retaining original Base rows. Current manufacturer and May 2020 own manual name F30 and F32/F33; exact selected retailer tables additionally identify F34 GT and F36 Gran Coupe, including xDrive. Those are exact per-part positives rather than an inference from related engines. Confirm actual B58, body, original downpipe connection, mounts and reusable valve motor; no later G-series application is inferred.
| Years | Make | Model | Named grade; actual B58 chassis, body and original valve-motor interface required |
|---|---|---|---|
| 2016-2018 | BMW | 340i | Base |
| 2017-2019 | BMW | 340i GT xDrive | Base |
| 2016-2018 | BMW | 340i xDrive | Base |
| 2017-2020 | BMW | 440i | Base |
| 2017-2020 | BMW | 440i Gran Coupe | Base |
| 2017-2020 | BMW | 440i xDrive | Base |
| 2017-2020 | BMW | 440i xDrive Gran Coupe | Base |
Verify 49-36334-P against the actual engine, flange, hangers and mounting locations and applicable emissions requirements before ordering.
| Detail | Value |
|---|---|
| Brand | aFe POWER |
| Manufacturer Part Number | 49-36334-P |
| System | MACH Force-Xp cat-back; own manual calls it down-pipe-back, original downpipe retained |
| Tubing / weld | 3-inch into 2.5-inch mandrel-bent brushed 304 stainless; hand TIG-welded |
| Selected muffler | 05-145119 polished tips |
| Tips | Dual 4-inch polished 304 stainless; separate tip PN/fixing unprinted |
| Clamps | THREE 3-inch bands 05-41055 and ONE stainless T-bolt clamp 03-50292 |
| Original components | Front nut, motor/bolts, rubber mounts/chassis bolts, cross member/hardware retained |
| Torque / recheck | No numeric torque printed; re-tighten clamps/bolts after 50-100 miles |
| Performance evidence | Actual linked chart tests a 2017 BMW 340i; test note identifies 49-36334-CB, so selected finish identity is not independently established by that run label. Marked point differences are 14.41 hp and 13.44 lb-ft near 5,631 rpm; run MAX differences are only 0.09 hp and 7.09 lb-ft. Baseline January 30, 2017 at 10:49 versus test January 31 at 09:57 have different weather: 67.14 F/29.54 inHg/18% humidity versus 63.71 F/29.49 inHg/29%. BOTH SAE factors 0.98, original intake and downpipe, Sport+ mode and 1,800-rpm start; baseline original exhaust versus aFe 3-inch exhaust. SAE correction/smoothing 5. Fuel, gear, load and hood position are unprinted. This does not guarantee advertised 14 hp/13 lb-ft as gains in run MAX values. |
| Emissions | Current exact primary says no CARB EO required; no converter or downpipe supplied |
FOUR main assemblies: front pipe 05-145116, mid-pipe #1 05-145117, mid-pipe #2 05-145118 and polished-tip muffler 05-145119. ONE stainless T-bolt clamp 03-50292 and THREE 3-inch band clamps 05-41055. Reuse original front nut, original valve MOTOR and its bolts, rubber hanger mounts and chassis fixing bolts, and original cross member/hardware. Original valve motor is NOT supplied. Dual 4-inch polished 304 stainless tips are specified; no separate tip service part/fixing is itemized. No replacement downpipe, converter, new gasket, extra rear tip clamps or intake filter/coupler is itemized.
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
FOUR main assemblies: front pipe 05-145116, mid-pipe #1 05-145117, mid-pipe #2 05-145118 and polished-tip muffler 05-145119. ONE stainless T-bolt clamp 03-50292 and THREE 3-inch band clamps 05-41055. Reuse original front nut, original valve MOTOR and its bolts, rubber hanger mounts and chassis fixing bolts, and original cross member/hardware. Original valve motor is NOT supplied. Dual 4-inch polished 304 stainless tips are specified; no separate tip service part/fixing is itemized. No replacement downpipe, converter, new gasket, extra rear tip clamps or intake filter/coupler is itemized.
Which BMW B58 models and years apply?BMW B58 3.0L turbocharged inline-six: 340i/340i xDrive 2016-2018, 340i GT xDrive 2017-2019, and 440i/440i xDrive/440i Gran Coupe/440i xDrive Gran Coupe 2017-2020, retaining original Base rows. Current manufacturer and May 2020 own manual name F30 and F32/F33; exact selected retailer tables additionally identify F34 GT and F36 Gran Coupe, including xDrive. Those are exact per-part positives rather than an inference from related engines. Confirm actual B58, body, original downpipe connection, mounts and reusable valve motor; no later G-series application is inferred.
Is a new exhaust-valve motor included?No. Transfer ORIGINAL motor to selected new muffler using ORIGINAL BOLTS and reconnect original valve plug. Do not discard motor or assume new actuator/coding hardware is supplied.
How many pipe sections and clamps are supplied?FOUR assemblies: front pipe, mid-pipe #1, mid-pipe #2 and selected muffler. THREE 3-inch band clamps and ONE stainless T-bolt clamp. Selected dual 4-inch tips have no separate service part/fixing count in own diagram.
What happens to battery, cross member and hanger mounts?Disconnect NEGATIVE battery before removal. Remove cross member and RESTORE it after alignment. Transfer ALL original rubber hanger mounts, secure with original chassis bolts, reconnect valve plug and reconnect battery.
What torque and mileage recheck are printed?NO numeric clamp, front-nut, motor, cross-member or hanger torque is printed. Align and tighten all connections. Re-tighten ALL clamps and bolts after 50-100 miles; do not borrow torque values from other manuals.
Does the system include a new downpipe or require cutting?No new downpipe/converter is itemized. Own down-pipe-back procedure retains original downpipe and supplies no cutting, drilling, sensor-wiring changes, coding or installation welding step. Battery and valve motor operations remain required.
How do point gains differ from run MAX values?Actual linked chart tests a 2017 BMW 340i; test note identifies 49-36334-CB, so selected finish identity is not independently established by that run label. Marked point differences are 14.41 hp and 13.44 lb-ft near 5,631 rpm; run MAX differences are only 0.09 hp and 7.09 lb-ft. Baseline January 30, 2017 at 10:49 versus test January 31 at 09:57 have different weather: 67.14 F/29.54 inHg/18% humidity versus 63.71 F/29.49 inHg/29%. BOTH SAE factors 0.98, original intake and downpipe, Sport+ mode and 1,800-rpm start; baseline original exhaust versus aFe 3-inch exhaust. SAE correction/smoothing 5. Fuel, gear, load and hood position are unprinted. This does not guarantee advertised 14 hp/13 lb-ft as gains in run MAX values.
Verify aFe 49-36334-P.
Actual linked chart tests a 2017 BMW 340i; test note identifies 49-36334-CB, so selected finish identity is not independently established by that run label. Marked point differences are 14.41 hp and 13.44 lb-ft near 5,631 rpm; run MAX differences are only 0.09 hp and 7.09 lb-ft. Baseline January 30, 2017 at 10:49 versus test January 31 at 09:57 have different weather: 67.14 F/29.54 inHg/18% humidity versus 63.71 F/29.49 inHg/29%. BOTH SAE factors 0.98, original intake and downpipe, Sport+ mode and 1,800-rpm start; baseline original exhaust versus aFe 3-inch exhaust. SAE correction/smoothing 5. Fuel, gear, load and hood position are unprinted. This does not guarantee advertised 14 hp/13 lb-ft as gains in run MAX values. No actual airflow chart or measured cabin-drone result is linked. Exact selected retailer positives support retained F34/F36/xDrive rows beyond narrower manufacturer chassis headline. No numeric clamp torque or separate tip fixing specification is borrowed.
California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.
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