aFe 49-36603 Takeda uses 2.5-inch brushed-finish, mandrel-bent 304 STAINLESS STEEL with TIG welds, a polished high-flow 304 stainless muffler and a 3.5-inch double-wall slash-cut tip. One assembled axle-back replaces the original muffler section using original spring bolts, gasket and transferred rubber hanger mount.
2012-2015 Honda Civic COUPE OR SEDAN with 1.8L four-cylinder, per current exact manufacturer. Own older manual prints 2012-2013; that document does not independently verify later-year procedural revisions. All original named-grade year bounds are retained. Legacy 2012 GX and truncated 2013 Natural labels are normalized to Honda's genuine Natural Gas model/grade name for those SAME YEARS: Honda officially states that Civic Natural Gas was formerly named Civic GX. Existing positive natural-gas application records are preserved, but fuel-specific exhaust clearance and dyno performance are not independently certified from shared displacement. Positive indexed 2014-2015 Natural Gas and Touring/DX extensions remain held; no new years or unrelated Si engine fitment is inferred.
| Years | Make | Model | Named grade; actual 1.8L coupe/sedan and exhaust interface required |
|---|---|---|---|
| 2012 | Honda | Civic | DX |
| 2012-2015 | Honda | Civic | EX |
| 2012-2015 | Honda | Civic | EX-L |
| 2012 | Honda | Civic | Natural Gas |
| 2012-2015 | Honda | Civic | HF |
| 2012-2015 | Honda | Civic | LX |
| 2013 | Honda | Civic | Natural Gas |
| 2015 | Honda | Civic | SE |
Verify 49-36603 against the actual engine, flange, hangers and mounting locations and applicable emissions requirements before ordering.
| Detail | Value |
|---|---|
| Brand | aFe POWER |
| Manufacturer Part Number | 49-36603 |
| System | Takeda axle-back, Civic 1.8L coupe/sedan |
| Tube / construction | 2.5-inch brushed 304 stainless, mandrel-bent, TIG-welded |
| Muffler / tip | Polished high-flow 304 stainless muffler; ONE 3.5-inch double-wall slash-cut 304 stainless tip |
| Service assembly | 05-45612, complete illustrated pipe/muffler/tip assembly |
| Original hardware | TWO spring bolts, original gasket if serviceable, transferred rubber hanger mount |
| Torque / recheck | No numeric spring-bolt torque or mileage interval supplied in own manual |
| Marked dyno point | 6,056 rpm: +3.45 HP / +3.00 lb-ft from actual labeled values |
| Curve-max differences | +2.69 HP / +1.43 lb-ft, not identical to advertised point gains |
| Dyno conditions | The actual linked Dynojet chart uses SAE correction and smoothing 5. At its marked 6,056 rpm point, modified/baseline values are 126.38/122.93 HP and 109.60/106.60 lb-ft: differences of 3.45 HP and 3.00 lb-ft. The independently listed curve maxima are 137.70/135.01 HP and 114.46/113.03 lb-ft: peak differences of 2.69 HP and 1.43 lb-ft. The advertised 3 HP/3 lb-ft should not be treated as identical peak-to-peak changes. Baseline uses OE intake/exhaust, Auto D3; modified uses OE intake and V2 axle-back, Auto D3. Baseline is February 28, 2013 at 8:16 AM, 60.37 F, 29.29 inHg, 22% humidity, SAE factor 0.98; modified is February 27 at 4:20 PM, 87.12 F, 29.31 inHg, 5% humidity, SAE factor 1.01. Different dates/weather/correction factors limit direct equivalence. The chart does not identify a named grade or certify natural-gas configurations. No actual bench-flow chart is linked. |
| Emissions | Current exact manufacturer states no CARB EO number is required for this axle-back. This does not authorize unrelated emissions-equipment changes or establish every local sound requirement. |
| UPC | 802959493175 |
| WARNING | This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov. |
ONE axle-back exhaust assembly, service part 05-45612, labeled Tail Pipe in the exact manufacturer illustration and incorporating the pipe, muffler and tip. Current manufacturer specifies 2.5-inch brushed-finish mandrel-bent 304 stainless tubing, TIG welds, a polished high-flow 304 stainless muffler and ONE 3.5-inch DOUBLE-WALL, SLASH-CUT, laser-etched 304 stainless tip. Reuse TWO ORIGINAL SPRING BOLTS, the ORIGINAL GASKET (replace if necessary) and TRANSFER THE ORIGINAL RUBBER HANGER MOUNT. No separately supplied clamp, new gasket, spring bolt, converter, sensor, valve, filter or intake coupler is listed in the actual bill.
aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.
ONE axle-back exhaust assembly, service part 05-45612, labeled Tail Pipe in the exact manufacturer illustration and incorporating the pipe, muffler and tip. Current manufacturer specifies 2.5-inch brushed-finish mandrel-bent 304 stainless tubing, TIG welds, a polished high-flow 304 stainless muffler and ONE 3.5-inch DOUBLE-WALL, SLASH-CUT, laser-etched 304 stainless tip. Reuse TWO ORIGINAL SPRING BOLTS, the ORIGINAL GASKET (replace if necessary) and TRANSFER THE ORIGINAL RUBBER HANGER MOUNT. No separately supplied clamp, new gasket, spring bolt, converter, sensor, valve, filter or intake coupler is listed in the actual bill.
Which body styles, engines and year limits apply?2012-2015 Honda Civic COUPE OR SEDAN with 1.8L four-cylinder, per current exact manufacturer. Own older manual prints 2012-2013; that document does not independently verify later-year procedural revisions. All original named-grade year bounds are retained. Legacy 2012 GX and truncated 2013 Natural labels are normalized to Honda's genuine Natural Gas model/grade name for those SAME YEARS: Honda officially states that Civic Natural Gas was formerly named Civic GX. Existing positive natural-gas application records are preserved, but fuel-specific exhaust clearance and dyno performance are not independently certified from shared displacement. Positive indexed 2014-2015 Natural Gas and Touring/DX extensions remain held; no new years or unrelated Si engine fitment is inferred.
What material and tip construction are verified?Current manufacturer specifies 2.5-inch BRUSHED 304 STAINLESS tubing, MANDREL BENDS and TIG WELDS. The high-flow muffler is polished 304 stainless. ONE 3.5-inch tip is DOUBLE-WALL, SLASH-CUT and laser etched, not a separately supplied alternate-finish tip.
Which original hardware and hanger are reused?Reuse TWO original muffler-to-mid-pipe SPRING BOLTS and ORIGINAL GASKET, replacing that gasket if necessary. TRANSFER the ORIGINAL RUBBER HANGER MOUNT onto the new axle-back and slide it back onto the chassis. A new gasket or new spring bolts are not listed in the own bill.
What torque and mileage interval are printed?No numeric spring-bolt torque and no mileage-based recheck interval are supplied. Recheck all work before lowering safely. The manual notes initial smoke during first few minutes; it is not a blanket diagnosis of later smoke.
Do the advertised gains equal peak-to-peak gains?The actual linked Dynojet chart uses SAE correction and smoothing 5. At its marked 6,056 rpm point, modified/baseline values are 126.38/122.93 HP and 109.60/106.60 lb-ft: differences of 3.45 HP and 3.00 lb-ft. The independently listed curve maxima are 137.70/135.01 HP and 114.46/113.03 lb-ft: peak differences of 2.69 HP and 1.43 lb-ft. The advertised 3 HP/3 lb-ft should not be treated as identical peak-to-peak changes. Baseline uses OE intake/exhaust, Auto D3; modified uses OE intake and V2 axle-back, Auto D3. Baseline is February 28, 2013 at 8:16 AM, 60.37 F, 29.29 inHg, 22% humidity, SAE factor 0.98; modified is February 27 at 4:20 PM, 87.12 F, 29.31 inHg, 5% humidity, SAE factor 1.01. Different dates/weather/correction factors limit direct equivalence. The chart does not identify a named grade or certify natural-gas configurations. No actual bench-flow chart is linked.
Why are Natural Gas labels qualified?Honda officially names the 2012 model Civic Natural Gas, formerly Civic GX. Existing 2012 GX and 2013 Natural application rows are renamed to Natural Gas WITHOUT changing those years. Fuel-specific physical fitment and dyno output are not independently established by the general 1.8L headline; positive later-year retailer records remain held.
Does no EO required mean unrestricted use?Current exact manufacturer states no CARB EO number is required for this axle-back. This does not authorize unrelated emissions-equipment changes or establish every local sound requirement. No decibel level or cabin-drone guarantee is supplied.
Verify aFe 49-36603.
The actual linked Dynojet chart uses SAE correction and smoothing 5. At its marked 6,056 rpm point, modified/baseline values are 126.38/122.93 HP and 109.60/106.60 lb-ft: differences of 3.45 HP and 3.00 lb-ft. The independently listed curve maxima are 137.70/135.01 HP and 114.46/113.03 lb-ft: peak differences of 2.69 HP and 1.43 lb-ft. The advertised 3 HP/3 lb-ft should not be treated as identical peak-to-peak changes. Baseline uses OE intake/exhaust, Auto D3; modified uses OE intake and V2 axle-back, Auto D3. Baseline is February 28, 2013 at 8:16 AM, 60.37 F, 29.29 inHg, 22% humidity, SAE factor 0.98; modified is February 27 at 4:20 PM, 87.12 F, 29.31 inHg, 5% humidity, SAE factor 1.01. Different dates/weather/correction factors limit direct equivalence. The chart does not identify a named grade or certify natural-gas configurations. No actual bench-flow chart is linked. Current exact manufacturer states no CARB EO number is required for this axle-back. This does not authorize unrelated emissions-equipment changes or establish every local sound requirement. Natural Gas naming corrections retain the original positive application years; they do not create independent fuel-specific fitment or performance proof. No unrelated numeric torque, new gasket inclusion or 50-100-mile interval 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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