Borla® (16-22) Camaro 304SS NPP Adapter Kit - 10 Second Racing
Borla® (16-22) Camaro 304SS NPP Adapter Kit - 10 Second Racing
Borla® (16-22) Camaro 304SS NPP Adapter Kit - 10 Second Racing


Borla® (16-23) Camaro 304SS NPP Adapter Kit

Regular price$875.99
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Compatible: (3.6L/6.2L)

2016 - 2023 Chevy Camaro LT

2016 - 2023 Chevy Camaro SS

2017 - 2023 Chevy Camaro ZL1


These pipes are intended to add the NPP (dual mode option) valves to Borla® systems 11920, 11921, 140687, and 140688 that did not come with NPP valves. They feature polished T-304 stainless steel tips. They can only be used with mufflers that have dual tips exiting the mufflers. These pipes replace the outside tail pipe on each muffler. Outside tail pipe on 11920, 11921, 140687, or 140688 must be cut off of the Axle-Back assembly in order for these tail pipes to be installed. Clamps included. Wiring and actuators are not included. They are not intended to add NPP to a vehicle that was not originally equipped with NPP.

The Nuclear Propulsion Package (NPP) option is a vacuum controlled valve on the factory exhaust which is controlled by the ECU. It will open and close based on RPM and throttle position. 

The valves will be open for the first two seconds that the car is started. It requires time for the vacuum pressure to build to close the valves. After that The operation of the NPP is normally closed, open on demand. Have someone stand behind the car and bring up the RPM to 3,500 and you should see the valves open. The butterfly operation is tied to the throttle position sensor and the RPM. It uses the throttle position to determine driver intent. Under normal operation the valves work as follows:

Below 30% throttle and 3,500 rpm the valves are closed.
Above 30% throttle and 3,500 rpm the valves will open.
Between 30% throttle and 80% throttle and above 3,500 rpm the valves are open.
Above 80% throttle and above 2,800 rpm the valves are open.

Dual Mode Exhaust is a feature that allows your Camaro to stay within 'driveby noise' compliance. At 3500 RPM the valves auto bypass the factory mufflers to form a temporary straight back system which allows increased airflow at higher speeds.




Built from premium, high-quality T-304 austenitic stainless steel, superior to T-400 series knockoffs (such as 409), to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow & power, and precision computer numerical control (CNC) manufacturing ensures an accurate fit.

Best of all, BORLA® stands behind every adapter/ connection pipe with a Million-Mile Warranty. Just what you'd expect from the world's most experienced (and most winning) exhaust brand.

Install Guide: