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Forum: Exhaust TECH 08-20-2018, 07:32 PM
Replies: 63
Views: 18,548
Posted By b-man
Here's a pair of 1959 389 log manifolds. ...

Here's a pair of 1959 389 log manifolds.

Pontiac exhaust manifolds have a nice free-flowing design, much less restricted than the standard exhaust manifolds of most other makes.
...
Forum: Exhaust TECH 06-16-2010, 10:25 PM
Replies: 63
Views: 18,548
Posted By b-man
The steel shim manifold gaskets do have some...

The steel shim manifold gaskets do have some additional material in between and around the ports but I've always left them alone. The gaskets came looking that way from the factory, the factory...
Forum: Exhaust TECH 06-11-2010, 11:55 PM
Replies: 63
Views: 18,548
Posted By b-man
My new pair of PYPES stainless steel headpipes...

My new pair of PYPES stainless steel headpipes arrived today (p/n DGA10S-1 & DGA10S-2), these will sure make setting up my 2-1/2" dual exhaust with log manifolds a lot easier.
...
Forum: Exhaust TECH 04-19-2010, 08:38 PM
Replies: 63
Views: 18,548
Posted By b-man
Thumbs up Yes I do, and I plan on buying a set to use on a...

Yes I do, and I plan on buying a set to use on a '64 GTO 389 engine that's going into my '64 LeMans convertible.

I made the ones in the pics about 12 years ago, and they will still need a lot of...
Forum: Exhaust TECH 04-18-2010, 11:34 PM
Replies: 63
Views: 18,548
Posted By b-man
Of course after you have done the work to enlarge...

Of course after you have done the work to enlarge the outlets you now need some larger headpipes (or downpipes) to take advantage of that modification.
...
Forum: Exhaust TECH 04-18-2010, 06:23 PM
Replies: 63
Views: 18,548
Posted By b-man
I did the work with a large hand air grinder that...

I did the work with a large hand air grinder that was equipped with a bullet-shaped stone that was about 1-3/4" in diameter or even a tad larger. If I wasn't careful it would start running around...
Forum: Exhaust TECH 04-18-2010, 06:34 AM
Replies: 63
Views: 18,548
Posted By b-man
Lightbulb Log Exhaust Manifold Tech

Most of us don't consider using the stock log-style exhaust manifolds for high performance. A set of headers or the factory HO/Ram Air manifolds are usually used in place of the more restrictive...
Showing results 1 to 7 of 7

 
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