1973-87 GM Trucks

Porterbuilt tubular control arms are built using thick-wall DOM tubing and CNC cut 3/16 pickeled plate steel. All bushing pivot tubes and ball joint cups are TIG welded.
1" NARROWED
FOR FACTORY CROSSMEMBER ONLY!

The 1973-87 Chevy Pickup Front Dropmember suspension system is designed to replace the factory cross-member and steering system. It is engineered as a modular bolt-in unit that requires no welding.
When combined with a 2.5” drop spindle, 29” tall tire, and Porterbuilt Tubular Control Arms, the Level 3 Front will set the lowest point of the factory frame rails on the ground when fully deflated.

Ride Height - 4"
Deflated Height - Lay Frame

The Dropmember Rear modular suspension system is designed to replace the factory components and improve ride quality, performance, aesthetics, and strength.

DOES NOT REQUIRE ANY BED FLOOR MODIFICATION!

Ride Height - 7"
Deflated Height - 3"

The Dropmember Rear modular suspension system is designed to replace the factory components and improve ride quality, performance, aesthetics, and strength.

Ride Height - 4"
Deflated Height - Lay Frame

Porterbuilt tubular control arms are built using thick-wall DOM tubing and CNC cut 3/16 pickeled plate steel. All bushing pivot tubes and ball joint cups are TIG welded.

1" NARROWED
FOR VERSION 7 DROPMEMBER ONLY

Porterbuilt tubular control arms are built using thick-wall DOM tubing and CNC cut 3/16 pickeled plate steel. All bushing pivot tubes and ball joint cups are TIG welded.

1" NARROWED
FOR VERSION 7 DROPMEMBER ONLY

The 1973-87 Chevy Pickup Front Dropmember suspension system is designed to replace the factory cross-member and steering system. It is engineered as a modular bolt-in unit that requires no welding.
When combined with a 2.5” drop spindle, 29” tall tire, and Porterbuilt Tubular Control Arms, the Level 1 Front will set the lowest point of the factory frame rails approximately 3" off of the ground when fully deflated.

Ride Height - 6-7"
Deflated Height - 3"

The 1973-87 Chevy Pickup Front Dropmember suspension system is designed to replace the factory cross-member and steering system. It is engineered as a modular bolt-in unit that requires no welding.
When combined with a 2.5” drop spindle, 29” tall tire, and Porterbuilt Tubular Control Arms, the Level 1 Front will set the bottom of the cab approximately 7-8" off of the ground at ride height.

Ride Height - 7-8"

The 1973-87 Chevy Pickup Front Dropmember suspension system is designed to replace the factory cross-member and steering system. It is engineered as a modular bolt-in unit that requires no welding.
When combined with a 2.5” drop spindle, 29” tall tire, and Porterbuilt Tubular Control Arms, the Level 2 Front will set the bottom of the cab approximately 5-6" off of the ground at ride height.

Ride Height - 5-6"

Porterbuilt tubular control arms are built using thick-wall DOM tubing and CNC cut 3/16 pickeled plate steel. All bushing pivot tubes and ball joint cups are TIG welded.
1" FORWARD & 1" NARROWED
FOR FACTORY CROSSMEMBER ONLY!