1988-1998 2WD Truck LS Exhaust Accessories

Clamps, reducers and bolts for the exhaust on a 1988-1998 two wheel drive OBS Chevy or GMC truck with an LS. Pick stainless band clamps for 2-1/2 or 3 inch tubing, a set of cone reducers from 3 to 2-1/2 inch, a 3 inch clamp with a port for the O2 sensor, or stainless steel header bolts.

OBS 2WD LS swaps
Two cone reducers per set
Stainless clamps and bolts

Find the 1988-1998 2WD truck headers, cast iron manifolds, mounts and crossmember on the 1988-1998 2WD GM truck LS page. Every exhaust item BRP stocks is in exhaust components.

1988-1998 2WD truck LS exhaust accessories

OBS truck clamps and reducers

O2 sensor clamp and header bolts

OBS exhaust parts at a glance

Two 2-1/2 inch pipe ends: 2-1/2 inch stainless clamp
Two 3 inch pipe ends: 3 inch stainless clamp
3 inch outlet into 2-1/2 inch pipe: cone reducer set
O2 sensor location on 3 inch pipe: 3 inch O2 clamp

1988-1998 2WD truck notes

The guide says LS truck exhaust manifolds fit this chassis, and that the Muscle Rods headers bolt in with the BRP kit.
Any low mount A/C compressor hits the frame here, so a high mount A/C kit is required.
The kit is meant for the BRP LH8 pan; an LS truck pan hangs about 1 inch below the frame.
Large case 6L80E and 6L90E transmissions fit the OBS tunnel without cutting, per the guide.

Notes from the 1988-1998 2WD GM truck LS install guide, titled for 1988-1998 2WD GM trucks and 1992-2000 2WD SUVs. Part sizes come from the product names.

1988-1998 2WD truck LS exhaust FAQ

Can I keep LS truck exhaust manifolds in an 88-98 C1500?

Yes. The guide says LS truck exhaust manifolds fit this chassis. BRP also lists cast iron manifolds and 1-7/8 inch headers on the parent truck page.

Do BRP headers bolt in on a 1988-1998 2WD OBS truck?

The guide states the Muscle Rods headers are designed to bolt in with this kit. Long tube and mid-length versions are listed for these trucks.

Why does my OBS LS swap need a high mount A/C bracket?

The guide says low mount A/C compressors of any kind will not clear the frame on this chassis.

Which clamps go with the cone reducers on an OBS truck exhaust?

Use a 3 inch band clamp on the large end of each reducer and a 2-1/2 inch band clamp on the small end.