Doug's Headers
The information below is compiled from Doug's web site and from Chevytalk's 55-57 forum

Fits the SBC 1955-57 Chevrolet Part number D356
Will fit factory "Bow-Tie" angle plug heads
Stock or dart heads
Stick or automatic transmission
Will fit with side engine mounts
3/4" forward mounts mounts
Excellent ground clearance (nothing below frame)
May have to remove glide mounts
Clears 605 Steering box

Specifications
Tube Diameter: 1-5/8"
Collector Size: 2-1/2"
Port Shape: OVAL

Notes:
Probably will have to cut 1/4" off of top bolt for idler arm
For more information go to Chevytalk header list

If you have anything you would like to add to this review or contribute a new review for a different header email me