Bulldog HD HD1215-0167 Heavy Duty Front Shock Absorber – Kenworth T660 / T680 / T800 / T880 / Peterbilt 348 / 367 / 384 / 579 / 587 The Bulldog HD HD1215-0167 is an ultra-premium nitrogen gas-charged front suspension shock absorber engineered for the demanding front axle environments of Class 8 Kenworth and Peterbilt platforms. Unlike standard-grade aftermarket replacements, every Bulldog HD shock is designed from the ground up to address the root causes of premature heavy duty shock failure — weak welds, leaking seals, and bushing degradation — delivering a unit that outlasts and outperforms the competition across the full service life of the vehicle. Length & Configuration
Extended Length: 21.34" / Collapsed Length: 13.74" / Stroke: 7.6" / Upper Mount: Eyelet / Lower Mount: Eyelet. Nitrogen gas charged. Sold individually.

Vehicle Fitment
Fits Kenworth T660 (2008–2019) — front suspension shock. Fits Kenworth T680 (2013–2024) — front suspension shock. Fits Kenworth T800 (2011–2016) — front suspension shock. Fits Kenworth T880 (2014–2020) — front suspension shock. Fits Peterbilt 348 (2010–2018) — front suspension shock. Fits Peterbilt 367 (2008–2018) — front suspension shock. Fits Peterbilt 384 (2008–2016) — front suspension shock. Fits Peterbilt 579 (2013–2020) — front suspension shock. Fits Peterbilt 587 (2011–2018) — front suspension shock.

Engineering Highlights
The chrome-plated, micro-polished piston rod minimizes friction throughout the full stroke cycle. A seamless inner working tube built 40% thicker than standard competitors ensures superior concentricity and a long-lasting seal even under the sustained high-load conditions characteristic of front axle suspension on loaded Class 8 trucks. The Square Groove PTFE piston seal reduces drag and heat buildup, while the double-lip seal construction keeps oil in and contaminants out across millions of compression and rebound cycles. All interior and exterior mount joints are finished with 360-degree robotic welds — the highest breakpoint and tensile strength rating in the industry. The shock body carries a 42-micron anti-corrosion surface finish with the highest salt spray resistance rating in the class. OE ENOS synthetic fluid handles temperatures from –40°F to 340°F for consistent damping performance year-round. Bulldog's proprietary hydraulic stop prevents the shock from topping out during severe extension, protecting the piston and valve pack on rough surfaces and over aggressive road impacts.

Performance Benefits
Properly functioning front shocks maintain steering control and stability under load, reduce uneven and accelerated front tire wear, improve braking distance by keeping tire contact with the road consistent after impacts, reduce shimmy and vibration transmitted through the steering column, and help protect other front-end components including tie rods, ball joints, and wheel bearings from premature wear caused by excessive suspension bounce. Fleets running quality front shocks report improved driver control and fewer unscheduled front suspension service events.

Cross Reference Numbers
Replaces Gabriel 85119, Monroe 65541, Sachs 315599, and OEM part numbers B716000, B71-6000, B716012, B71-6012, and 90045605.

Warranty
Backed by Bulldog HD's standard limited warranty. Contact seller for current warranty terms.

About Bulldog HD
Bulldog HD designs and manufactures ultra-premium heavy duty shock absorbers, steering dampers, and cab shocks engineered specifically for commercial truck fleets. Every Bulldog HD product is developed in collaboration with fleet maintenance technicians across North America, with each design targeting the most common real-world failure modes identified in the field. Bulldog HD shocks are built to outlast and outperform standard OEM replacements across the full service life of the vehicle.