aFe 49-04034 ATLAS uses 3-inch mandrel-bent STEEL tubing with a black finish, thermal header tape and CNC-machined V-band inlet/outlet flanges. The exact bill contains one downpipe assembly. Both original V-band clamps are reused, and the right front wheel must be removed and reinstalled.
2004.5-2010 Chevrolet Silverado and GMC Sierra 2500/3500 diesel applications with 6.6L Duramax LLY, LBZ or LMM, including the separately listed 2007 Classic models. Own July 2020 manual explicitly starts at 2004.5; 2004 named rows require the later LLY application, not LB7. Preserve the distinction between 2007 Classic and new-body trucks. Four missing named-grade groups and the separately proven 2006 Silverado 3500 WT year are restored from the exact current retailer table; the 2005 WT gap remains. Confirm actual engine, turbo/downpipe interface and body configuration.
| Years | Make | Model | Named grade; actual LLY/LBZ/LMM turbo-diesel and body configuration required |
|---|---|---|---|
| 2004-2005 | Chevrolet | Silverado 2500 HD | Base |
| 2005-2006 | Chevrolet | Silverado 2500 HD | LS |
| 2005-2010 | Chevrolet | Silverado 2500 HD | LT |
| 2007-2010 | Chevrolet | Silverado 2500 HD | LTZ |
| 2006-2010 | Chevrolet | Silverado 2500 HD | WT |
| 2004-2005 | GMC | Sierra 3500 | Base |
| 2006 | GMC | Sierra 3500 | SL |
| 2004-2006 | GMC | Sierra 3500 | SLE |
| 2004-2006 | GMC | Sierra 3500 | SLT |
| 2004-2006 | GMC | Sierra 3500 | WT |
| 2007 | GMC | Sierra 3500 Classic | SL |
| 2007 | GMC | Sierra 3500 Classic | SLE |
| 2007 | GMC | Sierra 3500 Classic | SLT |
| 2006 | GMC | Sierra 2500 HD | SL |
| 2004-2010 | GMC | Sierra 2500 HD | SLE |
| 2004-2010 | GMC | Sierra 2500 HD | SLT |
| 2004-2010 | GMC | Sierra 2500 HD | WT |
| 2007 | GMC | Sierra 2500 HD Classic | SL |
| 2007 | GMC | Sierra 2500 HD Classic | SLE |
| 2007 | GMC | Sierra 2500 HD Classic | SLT |
| 2007-2010 | GMC | Sierra 3500 HD | SLE |
| 2007-2010 | GMC | Sierra 3500 HD | SLT |
| 2007-2010 | GMC | Sierra 3500 HD | WT |
| 2007 | Chevrolet | Silverado 2500 HD Classic | LT |
| 2007 | Chevrolet | Silverado 2500 HD Classic | WT |
| 2004-2005 | Chevrolet | Silverado 3500 | Base |
| 2004-2006 | Chevrolet | Silverado 3500 | LS |
| 2004-2006 | Chevrolet | Silverado 3500 | LT |
| 2004 | Chevrolet | Silverado 3500 | WT |
| 2006 | Chevrolet | Silverado 3500 | WT |
| 2007 | Chevrolet | Silverado 3500 Classic | LS |
| 2007 | Chevrolet | Silverado 3500 Classic | LT |
| 2007 | Chevrolet | Silverado 3500 Classic | WT |
| 2007-2010 | Chevrolet | Silverado 3500 HD | LT |
| 2007-2010 | Chevrolet | Silverado 3500 HD | LTZ |
| 2007-2010 | Chevrolet | Silverado 3500 HD | WT |
| 2007 | Chevrolet | Silverado 2500 HD Classic | LS |
| 2004-2005 | GMC | Sierra 2500 HD | Base |
| 2007 | GMC | Sierra 2500 HD Classic | WT |
| 2007 | GMC | Sierra 3500 Classic | WT |
Verify 49-04034 against the actual engine, flange, hangers and mounting locations and applicable emissions requirements before ordering.
| Detail | Value |
|---|---|
| Brand | aFe POWER |
| Manufacturer Part Number | 49-04034 |
| System | ATLAS 3-inch steel turbo downpipe |
| Material / finish | STEEL, black finish and thermal header tape; no stainless grade inferred |
| Bill of materials | ONE downpipe assembly 05-142380 |
| Engine scope | 2004.5-2010 LLY/LBZ/LMM Duramax 6.6L turbodiesel; 2004 LB7 not inferred |
| Connections | CNC-machined V-band inlet/outlet; both original V-band clamps reused |
| Installation access | Right front wheel/inner fender, automatic-transmission dipstick tube, heat shield and lower bolt |
| Tightening order | Turbo V-band fully tightened first; heat shield restored; lower bolt tightened afterward |
| Wheel torque / check | Factory wheel specification, no numeric value supplied here; WHEEL NUTS re-torque at 50 miles |
| Exhaust torque | No numeric exhaust torque or exhaust-specific mileage recheck in exact manual |
| Performance evidence | No actual dyno or bench-flow chart is linked for this exact selection. General spool-response and heat-insulation claims do not establish numeric horsepower, torque, spool-time, EGT or underhood-temperature changes. |
| EO qualification | Manufacturer cites CARB EO D-550-48 and says SOME OR ALL listed applications are exempt. The indexed official Exhibit A names this exact part for LLY 2004-2006, LBZ 2006-2007 and LMM 2007-2010 Silverado/Sierra 2500/3500. The full order and its exact exclusions remain held after an earlier access challenge; no blanket all-vehicle certification is made. |
| UPC | 802959610275 |
| 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 turbo-downpipe assembly, service part 05-142380, is the sole item in the exact illustrated bill. Current manufacturer specifies 3-inch mandrel-bent STEEL with black finish and high-temperature thermal header tape, plus CNC-machined V-band inlet/outlet flanges. Reuse ORIGINAL TURBO AND CAT-PIPE V-BAND CLAMPS, lower retaining bolt, heat shield and screws. No separate new clamp, turbine gasket, converter, muffler, decorative tip, intake filter or coupler is listed in the actual bill. Generic current-page filter/coupler attributes do not establish those items as supplied.
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 turbo-downpipe assembly, service part 05-142380, is the sole item in the exact illustrated bill. Current manufacturer specifies 3-inch mandrel-bent STEEL with black finish and high-temperature thermal header tape, plus CNC-machined V-band inlet/outlet flanges. Reuse ORIGINAL TURBO AND CAT-PIPE V-BAND CLAMPS, lower retaining bolt, heat shield and screws. No separate new clamp, turbine gasket, converter, muffler, decorative tip, intake filter or coupler is listed in the actual bill. Generic current-page filter/coupler attributes do not establish those items as supplied.
Which years and engines fit?2004.5-2010 Chevrolet Silverado and GMC Sierra 2500/3500 diesel applications with 6.6L Duramax LLY, LBZ or LMM, including the separately listed 2007 Classic models. Own July 2020 manual explicitly starts at 2004.5; 2004 named rows require the later LLY application, not LB7. Preserve the distinction between 2007 Classic and new-body trucks. Four missing named-grade groups and the separately proven 2006 Silverado 3500 WT year are restored from the exact current retailer table; the 2005 WT gap remains. Confirm actual engine, turbo/downpipe interface and body configuration.
Are new turbo and cat-pipe clamps included?The exact bill lists only ONE downpipe assembly 05-142380. Save and REUSE the ORIGINAL CAT-PIPE V-BAND and ORIGINAL TURBO V-BAND. No additional supplied clamp or gasket is established by that bill.
Which parts are removed for access?Remove RIGHT FRONT WHEEL and PLASTIC INNER FENDER. Remove automatic-transmission dipstick/tube, lower retaining bolt and THREE heat-shield screws from underneath; remove turbo heat-shield screws and turbo V-band from above. Extract original pipe FROM BELOW.
What is the tightening and restoration order?Hold new pipe with lower bolt LOOSE, fully tighten TURBO V-BAND, reinstall turbo heat shield and screws, THEN fully tighten LOWER BOLT. Restore dipstick tube/dipstick, cat-pipe and saved V-band, inner fender and wheel.
What torque and mileage check are printed?Use FACTORY SPECIFICATIONS for the wheel and re-torque WHEEL NUTS after EXACTLY 50 MILES. No numeric exhaust torque or exhaust-specific mileage check is printed. Do not transfer a clamp interval from another kit.
Does thermal tape prove numeric gains?No actual dyno or bench-flow chart is linked for this exact selection. General spool-response and heat-insulation claims do not establish numeric horsepower, torque, spool-time, EGT or underhood-temperature changes. Current manufacturer specifies black finish and high-temperature thermal tape, but it supplies no measured numeric reduction for this exact selection.
Does the EO cover every vehicle?Manufacturer cites CARB EO D-550-48 and says SOME OR ALL listed applications are exempt. The indexed official Exhibit A names this exact part for LLY 2004-2006, LBZ 2006-2007 and LMM 2007-2010 Silverado/Sierra 2500/3500. The full order and its exact exclusions remain held after an earlier access challenge; no blanket all-vehicle certification is made.
Verify aFe 49-04034.
No actual dyno or bench-flow chart is linked for this exact selection. General spool-response and heat-insulation claims do not establish numeric horsepower, torque, spool-time, EGT or underhood-temperature changes. Manufacturer cites CARB EO D-550-48 and says SOME OR ALL listed applications are exempt. The indexed official Exhibit A names this exact part for LLY 2004-2006, LBZ 2006-2007 and LMM 2007-2010 Silverado/Sierra 2500/3500. The full order and its exact exclusions remain held after an earlier access challenge; no blanket all-vehicle certification is made. The exact manual specifies a wheel-nut recheck at 50 miles; do not substitute an unrelated exhaust-clamp torque or recheck interval. Original emission components are retained; the EO reference is not permission to remove a converter or DPF.
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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