1968-1974 Nova LS Exhaust Accessories

The clamps, reducers and bolts that complete the exhaust on a 1968-1974 Nova LS swap. This page carries 2-1/2 inch and 3 inch stainless band clamps, a two piece set of 3 to 2-1/2 inch cone reducers, a 3 inch band clamp with an O2 sensor port, and stainless bolts for the header flanges.

Fits 2-1/2 or 3 inch pipe
Two reducers per set
3 inch O2 sensor clamp

BRP mid-length headers for the 1968-1974 X-Body, plus the mounts and crossmember, are listed on the 1968-1974 Nova LS swap page. The complete exhaust range is under exhaust components.

1968-1974 Nova LS exhaust accessories

Clamps and reducers for the Nova

O2 clamp and header bolts

Matching the part to the Nova joint

Slip joint on 2-1/2 inch tubing: 2-1/2 inch stainless clamp
Slip joint on 3 inch tubing: 3 inch stainless clamp
Header collector at 3 inch, pipe at 2-1/2 inch: reducer set
Oxygen sensor needed on 3 inch pipe: O2 band clamp

1968-1974 X-Body header notes

The BRP mid-length header ends in a ball and socket collector. The long tube version uses a slip on collector.
The guide says all BRP headers for this body clear the factory A/C box, power steering box and power brakes.
Pairing a 4L80 with the mid-length headers means trimming the bell housing tabs for clearance.
Listed transmissions for these headers: TH350, TH400, Muncie, 700R4, T-56, 4L60E, 4L65E, 4L80E, 6L80, 6L90 and TR6060.
Headers and kit are designed around the GM LH-8 oil pan and a floor shifter; column shift linkage needs changes.

Notes from the 1968-1974 X-Body install guide, which covers the 1967-1969 F-Body and 1968-1974 X-Body. Part sizes come from the product names.

1968-1974 Nova LS exhaust FAQ

What kind of collector do BRP headers for a 1968-1974 Nova have?

Per the guide, the mid-length header has a ball and socket collector and the long tube header has a slip on collector.

Will the headers hit the power brake booster or steering box on my Nova?

The guide states that all BRP headers for this body clear the factory A/C box, power steering box and power brakes.

I am running a 4L80 behind the LS in my X-Body. Anything to know?

With the mid-length headers, the bell housing tabs on the 4L80 have to be trimmed for header clearance.

Which clamp adds an O2 sensor port to a 3 inch Nova pipe?

The 3 inch O2 sensor band clamp, which clamps the joint and provides the sensor port in the same part.