The BTR Gen V 5.3 Truck Norris Camshaft (BTR-GENV53TN) is a hydraulic roller camshaft for GM Gen V L83/L86 5.3L truck engines. It is a popular choice for deleting DOD/AFM cylinder deactivation and adding an aggressive idle sound while retaining strong OEM-like driving characteristics.
- Part Number: BTR-GENV53TN
- Application: GM Gen V (LT-Series) L83/L86, 5.3L
- Camshaft Style: Hydraulic Roller
- Intake/Exhaust Lift: 0.540 in / 0.540 in
- Lobe Separation Angle (LSA): 111°
- Fuel Lobe: 14%
- RPM Operating Range: 2000-6700 RPM
- Idle Quality: Great rumble sound without sacrificing factory comforts
- BTR Aggressiveness (Chop) Scale: 6/10
This camshaft requires a valve spring upgrade, BTR part number BTR91120-16, along with X12499225-16 lifters. A VVT phaser limiter is also required — BTR-VVT-GENV-4CAM for 2014-early 2019 L83/L86 engines, or BTR-VVT-GEN-VP-4CAM for 2019-and-later L84 engines. This camshaft works well with factory (stock) torque converters.
BTR's in-house dyno testing shows peak-to-peak gains of roughly 44 horsepower and 25 lb-ft of torque over a stock 5.3L truck camshaft, along with about 750 additional RPM of usable operating range.
FAQ
What valve springs and lifters does this camshaft require?
It requires the BTR91120-16 valve spring upgrade along with X12499225-16 lifters.
Does this camshaft need a VVT limiter?
Yes — a VVT phaser limiter is required: BTR-VVT-GENV-4CAM for 2014-early 2019 L83/L86 engines, or BTR-VVT-GEN-VP-4CAM for 2019-and-later L84 engines.
What is this camshaft commonly used for?
It's a popular choice for deleting DOD/AFM cylinder deactivation on Gen V 5.3L trucks while adding an aggressive idle.
Does it require a torque converter upgrade?
No, it works well with factory (stock) torque converters.
How much power does this camshaft gain over a stock truck cam?
BTR's in-house dyno testing shows peak-to-peak gains of roughly 44 horsepower and 25 lb-ft of torque over a stock 5.3L truck camshaft, along with about 750 additional RPM of usable operating range and a mild-mannered daily-driving feel with an aggressive rumble.
