1973-1987 2WD Truck LS Exhaust Accessories

Exhaust hardware for putting an LS in a 1973-1987 two wheel drive Chevy or GMC square body truck. Stainless band clamps come in 2-1/2 and 3 inch, the cone reducers step 3 inch pipe to 2-1/2 inch, a 3 inch clamp adds an O2 sensor port, and stainless bolts hold the headers to the heads.

Square body 2WD LS swaps
Clamps for 2-1/2 or 3 inch
O2 port built into a clamp

Long tube and mid-length headers for the 1973-1987 2WD truck, cast iron manifolds, mounts and the crossmember are on the 1973-1987 2WD GM truck LS page. All exhaust parts are grouped under exhaust components.

1973-1987 2WD truck LS exhaust accessories

Square body pipe clamps and reducers

Sensor port and header bolts

Square body exhaust parts by use

Truck pipe at 2-1/2 inch: 2-1/2 inch stainless clamp
Truck pipe at 3 inch: 3 inch stainless clamp
Bigger collector, smaller tailpipe: 3 to 2-1/2 inch reducers
Sensor bung needed in 3 inch pipe: O2 band clamp

1973-1987 2WD truck notes

The guide says the Muscle Rods header line is designed to bolt in with this mount kit.
The kit is set up for the BRP LH8 oil pan. A truck pan works but hangs well below the frame, which the guide does not suggest on a lowered truck.
Most factory and aftermarket accessory drives work, though a low mount A/C compressor needs custom lines.
Crossmember brackets are drilled in place, with fore and aft position set by the transmission you run.

Notes from the 1973-1987 2WD GM truck LS install guide, which also names 1973-1991 2WD SUVs. Part sizes come from the product names.

1973-1987 2WD truck LS exhaust FAQ

Do headers bolt in on a 73-87 C10 with the BRP LS kit?

The guide says the Muscle Rods headers are designed to bolt in with this kit. BRP lists 1-7/8 inch long tube and mid-length versions on the parent truck page.

Can I use the stock LS truck oil pan in my square body?

Yes, but the guide warns it hangs well below the frame and does not suggest it for lowered trucks. The kit is designed around the BRP LH8 pan.

Will a low mount A/C compressor work in a 1973-1987 2WD truck swap?

The guide says it can, but it needs custom made A/C lines.

What reduces a 3 inch exhaust to 2-1/2 inch on a C10?

The 3 to 2-1/2 inch cone reducers, two per set. Use 3 inch and 2-1/2 inch band clamps on each side of the step.