Bully Dog's Rapid Flow Air Intake System delivers cold, dense air to the vehicle's engine, easily outperforming OEM air intakes providing additional horsepower, torque and fuel efficiency.

Bully Dog's Rapid Flow Air Intake System delivers cold, dense air to the vehicle's engine, easily outperforming OEM air intakes providing additional horsepower, torque and fuel efficiency.

Bully Dog's Rapid Flow Air Intake System delivers cold, dense air to the vehicle's engine, easily outperforming OEM air intakes providing additional horsepower, torque and fuel efficiency.

Bully Dog's Rapid Flow Air Intake System delivers cold, dense air to the vehicle's engine, easily outperforming OEM air intakes providing additional horsepower, torque and fuel efficiency.

Bully Dog's Rapid Flow Air Intake System delivers cold, dense air to the vehicle's engine, easily outperforming OEM air intakes providing additional horsepower, torque and fuel efficiency.

Bully Dog’s new BDX hand-held performance tuner gives drivers the edge they need, whether tackling tough terrain, pulling a heavy payload or maximizing fuel economy on the highway.

The GT Gas is four products in one remarkable unit: a performance tuner, monitor, gauge, and diagnostic device all in a single unit.

The GT Diesel is four products in one remarkable unit: a performance tuner, monitor, gauge, and diagnostic device all in a single unit. This product does not support any changes to your vehicle's emission system

Bully Dog's performance intake manifold features smoother contours and larger ports, greatly improving airflow and providing even distribution of the air/fuel mixture to each cylinder.

The WatchDog is digital gauge pack helps develop fuel saving driving habits and provides extra monitoring of truck functions.

Inspired by our popular HDGT, the sleek, intuitive MDGT increases horsepower, torque, and fuel efficiency for tow trucks, tool trucks and medium-duty applications.

This turbo charger improves performance and reliability. Designed to create reliable and consistent boost, while reducing emissions and enhancing fuel efficiency.

For Holset turbo and for Kenworth/Peterbilt. Ceramic coated exhaust manifold typically fits years for Holset Turbo: 3406E 14.6L '95-'98, 3406E 15.8L '95-'98, C-15 14.6L '99-'03, C-16 15.8L '99-'03. Includes turbo studs. Replaces OEM center part# 146-9445.

Ceramic coated exhaust manifold typically fits years '96-'01. Includes turbo studs. Replaces OEM Center Part# 3078323.

Ceramic coated exhaust manifold typically fits years '00-'03. Includes turbo studs. Replace OEM Center Part# 3880199.

Ceramic coated exhaust manifold typically fits years '04-'07. Includes turbo studs. Replaces OEM center part# 3682959.

Ceramic coated exhaust manifold typically fits '08-'10. Includes turbo studs. Replaces OEM center part# 3683789.

For Kenworth/Peterbilt. Ceramic coated exhaust manifold. 3406E 14.6L '95-'98, 15.8L '95-'98, C-15 14.6L '99-'03, C-16 15.8L '99-'03. Includes turbo studs. Replaced OEM center part# 146-9445.

For Kenworth/Peterbilt. Ceramic coated exaust manifold for C-15 15.2L '04.5-'10. Includes turbo studs. Replaces OEM center part# 231-3462.

For Freight Liner/Western Star. Ceramic coated exhaust manifold typically fits years for 3046E 14.6L '95-'98, 15.8L '95-'98, C-15 14.6L '99-'03, C-16 15.8L '99--03. Includes turbo studs. Replaces OEM center part# 150-1914 & 100-5694.

For Freight Liner/ Western Star. Ceramic coated exhaust manifold typically fits years '04.5-'10. Includes turbo studs. Replaces OEM center part# 231-6127.

Ceramic coated exhaust manifold. Replaces OEM center part# 251-4410.

For Ford. Ceramic coated exhaust manifold typically fits years for 3406E 14.6L '95-'98, 3406E 15.8L '95-'98, C-15 14.6L '99-'03, C-16 15.8L '99-'03. Includes turbo studs. Australian application years differ. Replaces OEM center part# 150-1916.

Bully Dog’s new bolt-on Performance DPF for the Ford 6.4-liter Powerstroke features a larger and better-flowing filter to unleash your truck’s potential – legally.

The Bully Dog ECM Tuner is built with simple, easy-to-use performance in mind. This powerful device comes preloaded with the same high performance, dyno-proven tunes as our gauge tuners, except it is designed to be stowed away after installation–simply set it and forget it.