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Mod | | | Forums66 Topics128,136 Posts1,056,425 Members48,441 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Aug 2001 Posts: 47 Wrench Fetcher | | Wrench Fetcher Joined: Aug 2001 Posts: 47 | I'm surprised that exhaust improvement would not make a difference at highway speeds. Maybe the stock system is really efficent. Thanks for the response. | | |
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