aFe MACH Force-Xp Catback — Tacoma 2.4L/2.7L, 121.9-Inch WB

121.9-inch-wheelbase Tacoma cat-back with one polished tip

The aFe 49-46004 MACH Force-Xp uses 2-1/2-inch mandrel-bent 409 stainless tubing, MIG welds, a high-flow muffler and one 4-inch polished tip. The selected guide identifies that single tip as 304 stainless. Only 121.9-inch-wheelbase trucks are supported by the exact current fitment note and selected guide: Extended Cab/standard 74.4-inch bed or Double Cab/short 61.2-inch bed. Match actual gasoline L4 2.4L or 2.7L and year/trim availability; no other wheelbase, regular-cab or V6 approval is inferred.

Key Features

• Selected aFe part 49-46004.
• 2-1/2-inch 409 stainless main tubing with a muffler and one polished 4-inch outlet; not multiple tips.
• Only 121.9-inch-wheelbase trucks are supported by the exact current fitment note and selected guide: Extended Cab/standard 74.4-inch bed or Double Cab/short 61.2-inch bed. Match actual gasoline L4 2.4L or 2.7L and year/trim availability; no other wheelbase, regular-cab or V6 approval is inferred.
• one mid-pipe 05-44733, one muffler assembly 05-44734, one combined over-axle/tailpipe 05-44735, two 2-1/2-inch bands 05-41061 and one polished 304 stainless tip 49T30404-P121.
• Reuse original hardware and rubber isolation mounts. The selected guide does not specify gasket reuse or replacement; confirm the actual front-joint sealing requirement separately.
• The selected guide’s step 7 requires installing the original O2 sensor to factory torque specifications, and its diagram shows the sensor connection on the mid-pipe. It provides no earlier sensor-removal, connector or harness-routing step. Confirm the actual vehicle’s complete sensor transfer/reconnection and sealing procedure before work; retain a correct working original sensor arrangement. No numeric sensor torque or disabling operation is invented.
• The selected guide prints no numeric clamp, flange, tip or O2 torque. For the O2 sensor it explicitly directs factory specifications; obtain those for the exact vehicle.
• Selected tailpipe-to-body spacing is at least 1/2–1 inch. Retighten all exhaust components after 50–100 miles.
• The current page headline claims +6 hp/+7 lb-ft while its detail claims +3 hp/+4 lb-ft. No exact selected dyno chart is linked to resolve those figures. Its overview also incorrectly describes a 2005–2012 2.7L system; the exact selected application rows, fitment note and guide instead identify 1999–2004 2.4L/2.7L at 121.9 inches. These source conflicts remain explicit; no measured gain or later-generation fit is inferred.

Fitment

Only 121.9-inch-wheelbase trucks are supported by the exact current fitment note and selected guide: Extended Cab/standard 74.4-inch bed or Double Cab/short 61.2-inch bed. Match actual gasoline L4 2.4L or 2.7L and year/trim availability; no other wheelbase, regular-cab or V6 approval is inferred. The full exact-part secondary table supports Base and Pre Runner 1999–2004 and SR5 1999–2000. Original Limited 2000 is retained visibly UNVERIFIED pending exact named approval; omission from that table is not treated as a physical incompatibility. No new mapping or year extension is made.

Specifications

What's Included

• The 49-46004 kit includes one mid-pipe 05-44733, one muffler assembly 05-44734, one combined over-axle/tailpipe 05-44735, two 2-1/2-inch bands 05-41061 and one polished 304 stainless tip 49T30404-P121.
• Original hardware and rubber isolation mounts are retained. No separate extension, new catalyst, new sensor, intake filter or electrical equipment is listed.
• Native image shows the original-style mid-pipe sensor connection, but it does not provide a complete sensor-service procedure or unprinted new gasket bill. Obtain those requirements before work.

About aFe Power

aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.

Related Parts

• Exact selected manufacturer applications and 121.9-inch restriction
• Complete selected eight-step guide and sensor connection diagram
• Full exact-part secondary named application table
• Shop cat-back exhausts

FAQ

It is the selected 2-1/2-inch 409 stainless cat-back with one polished tip for the listed 1999–2004 Tacoma four-cylinder configurations at 121.9-inch wheelbase.

Only 121.9-inch-wheelbase trucks are supported by the exact current fitment note and selected guide: Extended Cab/standard 74.4-inch bed or Double Cab/short 61.2-inch bed. Match actual gasoline L4 2.4L or 2.7L and year/trim availability; no other wheelbase, regular-cab or V6 approval is inferred.

The current page headline claims +6 hp/+7 lb-ft while its detail claims +3 hp/+4 lb-ft. No exact selected dyno chart is linked to resolve those figures. Its overview also incorrectly describes a 2005–2012 2.7L system; the exact selected application rows, fitment note and guide instead identify 1999–2004 2.4L/2.7L at 121.9 inches. These source conflicts remain explicit; no measured gain or later-generation fit is inferred.

The existing Limited 2000 named scope remains UNVERIFIED: it is absent from the independently read exact-part named table and lacks exact manufacturer trim/engine/body confirmation here. Retention is not approval; confirm before ordering.

one mid-pipe 05-44733, one muffler assembly 05-44734, one combined over-axle/tailpipe 05-44735, two 2-1/2-inch bands 05-41061 and one polished 304 stainless tip 49T30404-P121.

The selected guide’s step 7 requires installing the original O2 sensor to factory torque specifications, and its diagram shows the sensor connection on the mid-pipe. It provides no earlier sensor-removal, connector or harness-routing step. Confirm the actual vehicle’s complete sensor transfer/reconnection and sealing procedure before work; retain a correct working original sensor arrangement. No numeric sensor torque or disabling operation is invented.

No numeric torque is printed. The O2 sensor explicitly uses factory torque specifications. Confirm actual front-joint sealing requirements and applicable flange/band/tip settings, and keep the tailpipe at least 1/2–1 inch from body panels.

Retighten all exhaust components after 50–100 miles. No cutting, extension adaptation, battery operation or another Tacoma system’s procedure is borrowed.

Installation Instructions

1. Confirm aFe 49-46004 against the exact vehicle and installed equipment. Inventory the actual components and follow the selected manufacturer instructions and current vehicle service requirements.
2. Match exact gasoline L4 2.4L/2.7L, named years, supported body and 121.9-inch wheelbase. Obtain confirmation of Limited 2000 if applicable, the complete original O2 sensor service arrangement and front-joint seal requirements before work. Cool and safely support vehicle and exhaust.
3. Remove original exhaust rear to front up to the catalytic-converter connection, preserving original hardware and isolation mounts. Keep new clamps loose until the whole system is installed. The selected guide does not supply the earlier sensor removal/reconnection details; follow confirmed exact vehicle service requirements.
4. Install the selected mid-pipe and attach original bolts loosely. Install a 2-1/2-inch band at the muffler inlet, fit the muffler to the mid-pipe and locate its hangers in original rubber isolation mounts.
5. Install the second 2-1/2-inch band at the muffler outlet, fit the combined over-axle/tailpipe into its factory rubber isolation mount, then fit the one polished tip and align the system.
6. Tighten bolts and clamps front to rear using applicable specifications. The selected step 7 installs the original O2 sensor to factory torque specifications; complete its confirmed original electrical and sealing arrangement before operation. No numeric sensor torque or sensor-disable operation is supplied.
7. Maintain at least 1/2–1-inch tailpipe-to-body spacing. Retighten all exhaust components after 50–100 miles. No extension, cutting or battery procedure is borrowed from the incorrectly described later system.

California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.