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More Cold Air, Less Heat Soak: The Closed-Box Advantage for Your 5.3L Truck
The Corsa 45953 MaxFlow 5 Closed Box Air Intake System replaces the restrictive factory airbox on 2019 to 2021 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks equipped with the 5.3L V8 EcoTec3 engine, delivering measurable gains in horsepower, torque, and throttle response. The 45953 also fits 2021 Chevrolet Tahoe, Suburban, GMC Yukon, and Yukon XL equipped with the 5.3L engine. Corsa engineers the 45953 intake housing from cross-linked polyethylene, a material that resists heat transfer to keep incoming air cooler than exposed open-element designs. The sealed box pairs with Corsa's signature MaxFlow 5 multi-layer oiled cotton gauze filter to deliver up to 26 percent greater airflow than stock while maintaining 98 percent filtration efficiency.
Key Features
- Corsa 45953 MaxFlow 5 closed box design isolates filter from hot engine bay air
- Cross-linked polyethylene housing resists heat and maintains structural rigidity
- MaxFlow 5 five-layer oiled cotton gauze filter, re-oil every 25,000 miles
- Up to plus 11 horsepower and plus 11 lb-ft torque on 5.3L EcoTec3 V8
- Plus 26 percent airflow increase over factory intake
- Direct bolt-on installation, no tune required
- Silicone couplers, stainless steel clamps, and all hardware included
- Made in the USA
- Non-CARB compliant (not for sale in California)
Vehicle Fitment
| Year Range | Make | Model | Trim |
|---|---|---|---|
| 2019-2021 | Chevrolet | Silverado 1500 | Custom, High Country, LT, LTZ, SSV, WT |
| 2019-2021 | GMC | Sierra 1500 | Denali, SLE, SLT |
| 2021 | Chevrolet | Tahoe | LS, LT, PPV, Premier, SSV, Z71 |
| 2021 | Chevrolet | Suburban | LT, Premier, Z71 |
| 2021 | GMC | Yukon | SLE, SLT |
| 2021 | GMC | Yukon XL | SLE, SLT |
Specifications
| Detail | Value |
|---|---|
| Part Number | 45953 |
| Filter Type | MaxFlow 5 Oiled Cotton Gauze |
| Filter Maintenance | Re-oil every 25,000 miles |
| Filtration Efficiency | 98% |
| Horsepower Gain | Up to +11 HP |
| Torque Gain | Up to +11 lb-ft |
| Airflow Improvement | +26% over stock |
| Housing Material | Cross-Linked Polyethylene |
| CARB Status | Non-CARB compliant |
| Tune Required | No |
| UPC | 847087015061 |
What's Included
- Corsa 45953 closed intake housing with MaxFlow 5 oiled filter pre-installed
- Cross-linked polyethylene intake tube
- Silicone couplers and stainless steel clamps
- All necessary hardware and brackets
- Installation instructions
About Corsa Performance
Corsa Performance has been engineering high-performance exhaust and intake systems in the USA since 1990. Every Corsa product is designed, tested, and manufactured at their Berea, Ohio facility, with a focus on measurable dyno-proven gains and direct bolt-on fitment with no permanent modifications required.
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Frequently Asked Questions
What is the Corsa 45953?The Corsa 45953 is a closed box cold air intake system designed for 2019 to 2021 Chevrolet Silverado 1500 and GMC Sierra 1500 trucks with the 5.3L V8 engine. It replaces the factory airbox with a sealed polyethylene housing and a MaxFlow 5 oiled cotton gauze filter to increase airflow by up to 26 percent.
Does the 45953 require a tune?No. The Corsa 45953 is a direct bolt-on upgrade that does not require an ECU tune. A tune may further enhance performance but is not necessary for the intake to function.
What filter maintenance does the MaxFlow 5 require?Re-oil the MaxFlow 5 filter every 25,000 miles and wash and re-oil every 40,000 miles. Corsa includes filter care instructions in the kit.
Will the 45953 fit the 2019 Classic body style Silverado?No. The 45953 fits the 2019 new body style (T1 platform) Silverado 1500 only. The 2019 Classic (LD) body style uses a different part number.
Does the 45953 fit the 6.2L Silverado?No. The 45953 is specific to the 5.3L V8. Silverado 1500 trucks with the 6.2L require a different Corsa intake part number.
Is the Corsa 45953 legal in California?No. The 45953 is not CARB compliant and is not legal for sale or use in California. California residents should look for a CARB-approved intake option.
Does this intake fit the GMC Yukon and Suburban?Yes. The 45953 also fits 2021 Chevrolet Tahoe, Suburban, and GMC Yukon and Yukon XL with the 5.3L V8 engine.
How difficult is installation?Installation takes approximately 30 minutes using basic hand tools including an 8mm socket and a T15 torx driver. No drilling or cutting is required. The kit includes all necessary hardware.
Installation Overview
- Disconnect the mass airflow sensor and breather hose from the factory airbox
- Remove the three 8mm bolts securing the factory air filter lid
- Remove the factory air filter lid and paper filter
- Set the Corsa 45953 housing in place and secure with the three stock bolts
- Slide the intake tube onto the airbox outlet and throttle body using the supplied silicone couplers
- Reinstall the mass airflow sensor using supplied screws and gasket
- Tighten all stainless steel clamps and reconnect the breather hose
- Start the engine and verify no air leaks
Prop 65 Warning: This product can expose you to chemicals including nickel compounds, which are known to the State of California to cause cancer, and carbon monoxide, which is known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
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