Manley Performance Dart Big Block Pro 1 & 320 / 360 Heads Exhaust

Features

- “H” suffix indicates higher hardness material
- Available with conventional square or Manley’s Bead Loc single radius keeper grooves

Specification

Square Groove
Head Diameter: 1.880
Stem Diameter: .3415
Installed Height: Stock
O/A Length: 5.440
Tip Length: .250
Underhead Angle/Radius: 30° x 5/8”
Seat Width: .075
Margin: .090
Wgt/Grams: 100