1-3/4″ W2 SB Step Headers

Retail Price: $984.00

Your Estimated Price: $0.00

  • Design:  Cylinder head center bolt-hole pattern spread must measure 3-15/16″ to use this header!
  • Primary tube size:  1-5/8″ O.D.
  • Secondary tube size: 1-3/4” O.D.
  • Collector size:  3″ with 3″ 3-bolt flange.
  • Flanges:  3/8″ thick, laser-cut, contoured for a leak free fit.
  • Material:  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.
  • Step design:  Provides low-end response and top-end horsepower gain.
  • Under chassis design:  Above the steering center link design offers maximum header to ground clearance.
  • Full length header design:  Proven power gains vs. shorty design.
  • Recommended for:  320-575 horsepower range.
  • Torsion bar removal:  Not required.
  • Header set includes:  Header gaskets, 12 header bolts, header reducer adapters with 3-bolt gaskets & hardware.
SKU: 360-H6-340AW2-C4 Categories: ,




67-76 A-BODY, 62-79 B-BODY, 70-74 E-BODY 76-80 F-BODY and 77-88 M-BODY CHASSIS.

[Check your engine location:  See FN39 for the factory dimensions]

Engine size:

273, 318, 340, 360 A/LA-engines, 402 crate, 408 Magnum crate, Mopar 440 Super Commando crate

Cylinder head:

W2 Econo 3870810, W2 Race P4532693, Aluminum Magnum P4532900, Large Port Commando P4532795

Note:  Your cylinder head center bolt hole pattern spread must measure 3-15/16″ from the center of the left bolt hole to the center of the right bolt hole for these headers to fit.   [See Bolt-hole measurement for illustration]

Spark Plugs:


Front Suspension:

OEM with torsion bars.

COILOVER without torsion bars (RMS Alterktion, Magnumforce XRT Tubular K-frame or Control Freak)

Steering Linkage:  OEM with torsion bars or Rack & Pinion without torsion bars.

Headers will not clear UniSteer Performance Rack and Pinion.

67-76 A-body applications:  Headers will not clear Firm Feel fast ratio pitman & idler arm.  The Firm Feel arm is 3/4″ longer than the stock arm.  (The OEM arm measures 5-1/4″ from center to center)

Engine Mounts:


Headers fit with Schumacher Creative Services engine mounts or equivalent.


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.