1958-1964 B-Body LS Exhaust Accessories

Clamps, reducers and bolts for the exhaust on a 1958-1964 B-Body LS swap, from the Impala and Bel Air to the Biscayne. In stock here: 2-1/2 inch and 3 inch stainless band clamps, a two piece 3 to 2-1/2 inch cone reducer set, a 3 inch O2 sensor band clamp and a set of stainless header bolts.

Stainless band clamps
3 to 2-1/2 inch reducer set
O2 sensor band clamp

The 1-3/4 inch long tube headers for this body, the cast iron LS manifolds and the mount and crossmember parts are on the 1958-1964 B-Body LS swap page. All BRP exhaust parts are grouped in exhaust components.

1958-1964 B-Body LS exhaust accessories

Impala pipe clamps and reducers

O2 clamp and stainless bolts

Early B-Body exhaust joints

Two 2-1/2 inch pipes: 2-1/2 inch clamp
Two 3 inch pipes: 3 inch clamp
Necking 3 inch down to 2-1/2 inch: reducer set
O2 sensor in a 3 inch run: O2 band clamp

1958-1964 B-Body header notes

The guide says the headers clear the factory A/C box, power steering box and power brakes on these cars.
Kit and headers for the early B-Body are meant for the GM 98-02 F-Body oil pan.
The 98-02 Camaro and Firebird alternator and power steering work here, but A/C takes the BRP high mount compressor bracket.
Headers are drawn around a floor shift linkage. Column shift linkage has to be modified.

Notes from the 1958-1964 B-Body LS install guide. Part sizes come from the product names.

1958-1964 B-Body LS exhaust FAQ

What headers fit a 1958-1964 Impala LS swap?

BRP lists a 1-3/4 inch ceramic coated long tube header for the 1958-1964 B-Body on the parent swap page. The clamps, reducers and bolts here finish the system behind it.

Which transmissions clear the early B-Body headers?

The guide names the T-56, 4L60E, 4L65E, 4L80E, 4L85E, 6L80E and 6L90E. A T-56, TR-6060, 6L80 or 6L90 also needs tunnel work.

Might the starter have to come off for a 1962 Impala header install?

Possibly. The guide says some installs need the starter, valve cover and/or spark plugs removed first.

Is the O2 sensor clamp only for 3 inch pipe?

Yes. The O2 sensor band clamp BRP lists is a 3 inch part. On 2-1/2 inch pipe, use the plain 2-1/2 inch band clamp.