C4 Corvette LS Exhaust Parts, 1984-1996

C4 Corvette LS swap exhaust parts: 2-1/2 inch and 3 inch stainless band clamps for slip-free pipe joints, a pair of 3 to 2-1/2 inch cone reducers, a 3 inch clamp that carries an O2 sensor, and stainless steel bolts for the header flanges.

Stainless band clamps
3 to 2-1/2 inch reducer pair
3 inch clamp with O2 port

Mounts, C-beam brackets, radiators and fuel pumps for the C4 are on the 1984-1996 Corvette LS swap page. The rest of the exhaust range is under exhaust components.

C4 Corvette LS exhaust parts

C4 clamps and cone reducers

Header bolts and O2 band clamp

Matching C4 parts to the pipe

Running 2-1/2 inch tubing: 2-1/2 inch band clamp
Running 3 inch tubing: 3 inch band clamp
Necking 3 inch down to 2-1/2 inch: cone reducers
Adding a sensor on 3 inch tubing: O2 clamp

1984-1991 Corvette header notes

Per the guide, the driver side header goes in and out from the top and the passenger side from the bottom.
Pull the spark plugs for header work. The starter can stay on the engine.
The C4 kit needs the factory 1998-2002 F-Body LS oil pan; the guide says other pans are too deep at the front to clear the frame.
Low mount alternators and A/C compressors do not clear the frame, and truck intakes are too tall for the stock hood.

Notes from the 1984-1991 Corvette LS install guide. Part sizes come from the product names.

C4 Corvette LS exhaust FAQ

Does BRP sell headers for a C4 Corvette LS swap?

None are listed on the C4 pages right now. The guide says Muscle Rod headers from Hedman Hedders are designed to bolt in with the kit.

How do headers go into a C4 with an LS?

The guide says the driver side goes in and out from the top and the passenger side from the bottom, with the spark plugs removed. The starter can stay in place.

Which oil pan clears the frame in a 1984-1991 Corvette?

The factory 1998-2002 F-Body LS pan. The guide says other pans are too deep at the front.

What do I use to step a 3 inch C4 exhaust down to 2-1/2 inch?

The 3 to 2-1/2 inch cone reducers, then the 2-1/2 inch band clamp on the smaller side.