aFe 49-36335-P MACH Force-Xp uses 3-inch into 2.5-inch mandrel-bent brushed 304 stainless tubing and a black-coated transverse muffler. Hand TIG-welded construction, a factory-style valve using the transferred original motor and dual 4-inch polished stainless tips form this two-assembly axle-back.
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. Original seven Base rows and bounds are retained. Current primary and own May 2020 manual name F30/F32/F33; exact selected BMP table additionally supports F34 GT/F36 Gran Coupe and xDrive. Confirm actual B58, body, original exhaust punch mark/routing, mounts and reusable valve motor; no later G-series or related-engine fitment is inferred.
| Years | Make | Model | Named grade; actual B58 body, original punch-mark routing and reusable valve motor 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 49-36335-P against the actual engine, flange, hangers and mounting locations and applicable emissions requirements before ordering.
| Detail | Value |
|---|---|
| Brand | aFe POWER |
| Manufacturer Part Number | 49-36335-P |
| System | MACH Force-Xp two-assembly axle-back; retained original front exhaust |
| Material / weld | 3-inch into 2.5-inch mandrel-bent brushed 304 stainless; hand TIG-welded |
| Selected tips | Dual 4-inch POLISHED 304 stainless; 05-145119 muffler assembly |
| Adaptor / clamps | 05-145121 adaptor; ONE 05-41055 3-inch band; ONE 03-50292 stainless T-bolt clamp |
| Removal cut | Figure A: 1-5/8 inches from BMW punch mark TOWARD BACK OF CAR |
| Original parts | Motor/bolts, rubber mounts/fixings, original downpipe clamp and cross member/hardware reused |
| Torque / recheck | No numeric torque printed; re-tighten ALL clamps/bolts after 50-100 miles |
| Performance evidence | No actual dyno or airflow chart, numeric horsepower/torque gain or measured cabin-drone result is linked for this axle-back. Full cat-back test results do not certify this two-assembly rear section. Selected primary and muffler service identity specify polished tips despite generic black-tip copy in some retailer descriptions. |
| Emissions | Current primary says no CARB EO number required; no replacement converter supplied |
TWO main assemblies: adaptor pipe 05-145121 and POLISHED-TIP muffler assembly 05-145119. ONE 3-inch band clamp 05-41055 and ONE stainless T-bolt clamp 03-50292. Original valve MOTOR/bolts, rubber hanger mounts, original hanger/chassis fixing hardware, original downpipe band clamp and cross member/hardware are reused. Primary specifies dual 4-inch POLISHED 304 stainless tips; separate tip service identity/fixing is not itemized. Black-tip 05-145120 is the alternative, not an extra assembly. Original front exhaust is retained after the prescribed cut. No full-length front/mid-pipe set, replacement downpipe/converter, new gasket 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.
TWO main assemblies: adaptor pipe 05-145121 and POLISHED-TIP muffler assembly 05-145119. ONE 3-inch band clamp 05-41055 and ONE stainless T-bolt clamp 03-50292. Original valve MOTOR/bolts, rubber hanger mounts, original hanger/chassis fixing hardware, original downpipe band clamp and cross member/hardware are reused. Primary specifies dual 4-inch POLISHED 304 stainless tips; separate tip service identity/fixing is not itemized. Black-tip 05-145120 is the alternative, not an extra assembly. Original front exhaust is retained after the prescribed cut. No full-length front/mid-pipe set, replacement downpipe/converter, new gasket or intake filter/coupler is itemized.
Which 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. Original seven Base rows and bounds are retained. Current primary and own May 2020 manual name F30/F32/F33; exact selected BMP table additionally supports F34 GT/F36 Gran Coupe and xDrive. Confirm actual B58, body, original exhaust punch mark/routing, mounts and reusable valve motor; no later G-series or related-engine fitment is inferred.
Does the original exhaust require cutting?Yes. Own Figure A marks CUT HERE 1-5/8 inches from the BMW punch mark TOWARD THE BACK OF THE CAR. Confirm actual pipe and diagram direction before cutting. Full cat-back procedure does not substitute for this axle-back cut.
Is the original valve motor reused?Yes. Remove original motor, transfer it to new polished-tip muffler using ORIGINAL BOLTS and reconnect original plug. No new motor is supplied.
Which finish is selected?Dual 4-inch POLISHED 304 stainless tips on muffler assembly 05-145119. Black 05-145120 is the alternative. Generic retailer black-tip wording does not change the selected primary/service identity.
What happens to the battery, cross member and original front exhaust?Disconnect NEGATIVE battery and remove cross member before removal. Reinstall retained original front exhaust using original downpipe band clamp, reconnect motor plug, RESTORE cross member and reconnect battery. Transfer original rubber hangers and retain original fixing hardware.
What clamp torque and mileage recheck apply?NO numeric torque is printed. Align and tighten all connections and original fixing hardware. Re-tighten ALL clamps and bolts after 50-100 miles. Do not borrow a numeric torque from the full cat-back or another kit.
Are dyno gains or a new downpipe supplied?No actual dyno or airflow chart, numeric horsepower/torque gain or measured cabin-drone result is linked for this axle-back. Full cat-back test results do not certify this two-assembly rear section. Selected primary and muffler service identity specify polished tips despite generic black-tip copy in some retailer descriptions. No replacement downpipe/converter or new gasket is itemized.
Verify aFe 49-36335-P.
No actual dyno or airflow chart, numeric horsepower/torque gain or measured cabin-drone result is linked for this axle-back. Full cat-back test results do not certify this two-assembly rear section. Selected primary and muffler service identity specify polished tips despite generic black-tip copy in some retailer descriptions. Factory-location installation wording does not remove the original-pipe cut. Confirm Figure A direction and actual BMW punch mark. Exact retailer positives support retained GT/Gran Coupe/xDrive rows beyond narrower manufacturer chassis headline.
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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