62-67 B-Body 1-3/4″ Poly 313/318 Headers available in Bare Mild Steel, Ceramic Coated or Polished Ceramic Coated. NOTES:- The Poly Engine was used only until 1966 in the US, but used up to 1967 in Canadian Built Vehicles. The 313 Poly Engine was used in Canadian Built Vehicles until 1964.1-3/4″ O.D. Tubes with 3″ 3-bolt Collectors.Recommended for 320-550 Horsepower.Above the Steering Center Link design offers Maximum Header to ground clearance.One piece Header Tubes / No slip tubes.Constructed of 16 gauge Mild Steel Tubing.Mandrel bent on sophisticated computer controlled bending machines for precise fit and uninterrupted Exhaust flow. The Mandrel bending process maintains a constant inside diameter of the tube for a smoother finish with no restriction of flow and no crimping of the tubes.3/8″ thick Laser-cut header flanges contoured for a leak free fit3/8″ thick Laser-cut 3-bolt collector flangesCoupled with a TTI Exhaust Systems these headers become even more efficient!O2 Sensor Bungs, Evacuation Tubes, and EGT probe fittings can be installed prior to Coating Headers.Fitment Issues……………….Suspension: OEMAuto Trans: YESStandard Trans: YESFloor Shift: YESColumn Shift: ? …Due to various manufacturing designs; column shift linkage may require modification.Push Button: YESManual Steering: YESPower Steering: YESStarters: OEMChrysler Mini Starters: R53005984, 56027702ACMopar Performance starters: P5249644AB, P5007860, P4286522Mini Starters can easily be changed without removing the headerFlywheel: ALLBell Housing: ALLOil Filters: OEM or Remote mountOil Pans: ALLClutch Linkage: OEMSteering Linkage: OEMDue to the numerous engine configurations and suspension combinations, TTI cannot ensure headers and exhaust to fit all combinations, however, we have done our best to accommodate both factory and aftermarket component combinations. e.g. Engine blocks, cylinder heads, starters, valve covers, etc.