T&D Machine SportComp 1.80 Ratio LH Offset Rocker Arm — Fits Big Block Chevy

SKU: BJJD_14-1291-180
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About T&D Machine

T&D Machine engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full T&D Machine lineup with fast shipping and expert fitment support — order with confidence.

Advanced Valvetrain Control

Take control of your engine's performance with the T&D Machine SportComp 1.80 Ratio Left-Hand Offset Rocker Arm. Designed for the serious engine builder, this shaft-mount system is the ultimate solution for Big Block Chevy engines that require specific offset geometry. By maintaining precise valve train alignment, you can safely run more aggressive camshaft profiles without the risk of component deflection or failure.

Technical Advantages

  • Ratio: 1.80 for increased valve lift
  • Offset: Left-Hand (LH) .170
  • Material: Aerospace-grade aluminum
  • Design: Shaft-mount for maximum rigidity
  • Tip: Full roller for reduced friction
  • Fitment: Big Block Chevy

The SportComp series is engineered to handle the stresses of high-RPM operation while maintaining the lightweight characteristics required for quick throttle response. The left-hand offset is precision-machined to ensure the roller tip tracks perfectly across the valve stem, minimizing wear and maximizing energy transfer from the camshaft to the valve. This level of precision is essential for maintaining consistent valve timing and lift, especially in high-compression or boosted applications. The shaft-mount design provides a rigid platform that far outperforms traditional stud-mount rockers, giving you the peace of mind to push your engine harder and longer. With a focus on durability and performance, these rockers are a vital upgrade for any serious BBC build. Elevate your engine's capabilities with professional-grade components from GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About T&D Machine

T&D Machine engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full T&D Machine lineup with fast shipping and expert fitment support — order with confidence.

Advanced Valvetrain Control

Take control of your engine's performance with the T&D Machine SportComp 1.80 Ratio Left-Hand Offset Rocker Arm. Designed for the serious engine builder, this shaft-mount system is the ultimate solution for Big Block Chevy engines that require specific offset geometry. By maintaining precise valve train alignment, you can safely run more aggressive camshaft profiles without the risk of component deflection or failure.

Technical Advantages

  • Ratio: 1.80 for increased valve lift
  • Offset: Left-Hand (LH) .170
  • Material: Aerospace-grade aluminum
  • Design: Shaft-mount for maximum rigidity
  • Tip: Full roller for reduced friction
  • Fitment: Big Block Chevy

The SportComp series is engineered to handle the stresses of high-RPM operation while maintaining the lightweight characteristics required for quick throttle response. The left-hand offset is precision-machined to ensure the roller tip tracks perfectly across the valve stem, minimizing wear and maximizing energy transfer from the camshaft to the valve. This level of precision is essential for maintaining consistent valve timing and lift, especially in high-compression or boosted applications. The shaft-mount design provides a rigid platform that far outperforms traditional stud-mount rockers, giving you the peace of mind to push your engine harder and longer. With a focus on durability and performance, these rockers are a vital upgrade for any serious BBC build. Elevate your engine's capabilities with professional-grade components from GGCRACING.

Product Details

Product Description

About T&D Machine

T&D Machine engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full T&D Machine lineup with fast shipping and expert fitment support — order with confidence.

Advanced Valvetrain Control

Take control of your engine's performance with the T&D Machine SportComp 1.80 Ratio Left-Hand Offset Rocker Arm. Designed for the serious engine builder, this shaft-mount system is the ultimate solution for Big Block Chevy engines that require specific offset geometry. By maintaining precise valve train alignment, you can safely run more aggressive camshaft profiles without the risk of component deflection or failure.

Technical Advantages

  • Ratio: 1.80 for increased valve lift
  • Offset: Left-Hand (LH) .170
  • Material: Aerospace-grade aluminum
  • Design: Shaft-mount for maximum rigidity
  • Tip: Full roller for reduced friction
  • Fitment: Big Block Chevy

The SportComp series is engineered to handle the stresses of high-RPM operation while maintaining the lightweight characteristics required for quick throttle response. The left-hand offset is precision-machined to ensure the roller tip tracks perfectly across the valve stem, minimizing wear and maximizing energy transfer from the camshaft to the valve. This level of precision is essential for maintaining consistent valve timing and lift, especially in high-compression or boosted applications. The shaft-mount design provides a rigid platform that far outperforms traditional stud-mount rockers, giving you the peace of mind to push your engine harder and longer. With a focus on durability and performance, these rockers are a vital upgrade for any serious BBC build. Elevate your engine's capabilities with professional-grade components from GGCRACING.

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