Off Road Exhaust.

[Karl K.]

Hello,
I am trying to find out what the off road exhaust option is for the midyear Corvettes compared to the standard exhaust.
and if is specific to certain engine options. Thanks for any help.

[Donald T.]

Re: Off Road Exhaust.

Karl,

The off road exhuast option was a performance under car exhaust option that had fewer baffles and therefore was louder and less restrictive. It was only available for 2.5 inch exhaust systems for the higher performance engines.

[Wayne M.]

Re: Off Road Exhaust.

Karl,

The off road exhuast option was a performance under car exhaust option that had fewer baffles and therefore was louder and less restrictive. It was only available for 2.5 inch exhaust systems for the higher performance engines.

This was the case for '63-5, with the 2_1/2" exh. manifolds, but in '66-7, the manual transmission cars retained the larger exhaust front pipes that were reduced down to the 2" manifolds.

So the dealer order form says N11 could be ordered with all engines with 3 or 4 speed manual transmissions. Only exceptions were automatics.

In 1966-7, N14 (side exhaust) was available on ALL Corvettes, including automatics.