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Better breathing on a C7 Stingray with Holley’s iNTECH cold-air intake

Uncorked Corvette

Wes Duenkel Jun 8, 2018
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Direct-injection, variable camshaft timing, forced induction … even with all the modern whiz-bang technology, internal combustion engines have been—from their invention—glorified air pumps. So, an increase in airflow will usually increase horsepower.

The latest Corvette Stingray is no exception. Its direct-injected Gen V small-block V-8 engine produces 460 horsepower and a like amount of torque. But the designers at Holley Performance Products in Bowling Green, Kentucky, still found some horsepower hidden in the intake system.

Holley’s latest addition to their new iNTECH cold-air intake lineup covers 2014-’17 Corvettes. It replaces everything from the throttle body to the fender, and features a unique, patent-pending “slip seal” air tube/filter/housing interface that eliminates troublesome clamps at this critical junction.

The system sports an OEM-like appearance that blends in nicely inside the Stingray’s engine compartment. The one-piece intake tube draws air through a high-flow, washable, four-layer performance air filter and connects to the throttle body with a flexible silicone coupling. All this adds 21 horsepower and 21 lb-ft of torque to the rear wheels. The gains aren’t just at the peak, but right across the meaty section of the powerband.

We visited Holley’s facility to witness the installation of their iNTECH cold-air intake on a C7 Stingray. Even stopping to take photos, the installation took about an hour. Twenty-one horsepower over a lunch break? We’ll take it! Vette

002 Holley Intech Cold Air Intake C7  Corvette 2/24

1. The Holley iNTECH cold-air intake is a direct replacement for the factory intake system. It includes a one-piece intake tube, filter housing, high-flow filter, clamps, detailed instructions, and all necessary fittings and hardware.

003 Corvette Radiator Duct 3/24

2. We began by removing the factory radiator duct to gain full access to the intake tube.

004 Corvette Pcv Connector Removal 4/24

3. Next, we removed the PCV fittings from the OEM intake tube.

005 Corvette Maf Mass Air Flow Sensor Connector 5/24

4. The last thing to be disconnected from the OEM intake tube was the mass airflow (MAF) sensor.

006 Corvette Air Inlet Duct Hose Tube 6/24

5. After loosening the hose clamps on both ends, we removed the OEM intake tube.

007 Corvette Air Filter Housing Cover 7/24

6. Then, we unscrewed the two fasteners from the filter housing cover and removed it from the engine compartment.

008 Corvette Air Filter Removal 8/24

7. With the cover removed, the OEM paper air filter slid out.

009 Corvette Air Filter Housing Removal 9/24

8. To remove the stock filter housing, we unscrewed the fasteners and firmly pulled to disengage the rubber mounting grommets.

010 Corvette Stock Holley Intech Air Filter 10/24

9. We compared the stock paper filter (left) to the conical Holley iNTECH four-layer, high-flow filter (right). Note that the sharp pleats in the paper filter greatly restrict flow, compared to the rounded pleats on the Holley filter.

011 Holley Intech Cold Air Intake Grommet Transfer 11/24

10. With the stock intake system completely removed, we transferred the rubber isolation grommets from the stock filter housing to the Holley iNTECH filter housing.

012 Corvette Maf Mass Air Flow Sensor Removal 12/24

11. Next, we removed the MAF sensor from the OEM filter hosing cover.

013 Holley Intech Cold Air Intake Maf Mass Air Flow Sensor 13/24

12. Using the supplied screws, we installed the MAF sensor into the Holley iNTECH cold-air intake tube.

014 Holley Intech Cold Air Intake Fittings 14/24

13. Then, we installed the supplied PCV fittings into the Holley iNTECH cold-air intake tube.

015 Holley Intech Cold Air Intake Filter Housing 15/24

14. Next, we installed the Holley iNTECH air filter housing to the inner fender of the Corvette using the factory mounting points and the supplied hardware.

016 Holley Intech Cold Air Intake Silicone Coupler 16/24

15. After placing a clamp over one end of the included silicone coupler, we slid the coupler over the throttle body’s sealing flange.

017 Holley Intech Cold Air Intake Filter 17/24

16. Next, we installed the filter over the intake tube.

018 Holley Intech Cold Air Intake Tube Installation 18/24

17. Note how the air filter, intake tube and air filter housing fit together without any clamps!

019 Holley Intech Cold Air Intake Clamp Installation 19/24

18. Then, we installed the intake tube into the silicone coupler and sealed it with the supplied clamp.

020 Holley Intech Cold Air Intake Maf Connector 20/24

19. Next, we reconnected the MAF sensor.

021 Holley Intech Cold Air Intake Pcv Fittings 21/24

20. Then, we reinstalled the PCV lines. Note that the Holley iNTECH system includes an anti-resonance chamber to cancel out annoying intake drone.

022 Holley Intech Cold Air Intake Radiator Duct 22/24

21. We finished the installation by reattaching the radiator duct.

023 Holley Intech Cold Air Intake Installed 23/24

22. The Holley iNTECH cold-air intake blends in perfectly to the engine compartment of this Stingray. Heck, we think it looks better than the stock system.

024 Holley Intech Cold Air Intake Dyno Chart 24/24

23. Not only does the Holley iNTECH cold-air intake system look better than the stock system—it performs better, too. It added as much as 21 horsepower and 21 lb-ft of torque across a wide range on this Corvette. Impressive.

Photos by Wes Duenkel


Bowling Green, KY 42101



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