AS&M large tube runners
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Junior Member
Joined: Jan 2016
Posts: 24
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From: Michigan
Car: 89 Iroc Camaro
Engine: 5.7 l98
Transmission: 700R4
Axle/Gears: 3.70
AS&M large tube runners
Hey everyone just a quick question. I have an 89 Iroc 5.7, car has a mild can and headers already. Thinking about ordering a set of AS&M runners. The intake is bone stock.do I have to have the plenum ported to match the new runners? If I don't what are some of the down falls of not having it done?
Junior Member
Joined: Jul 2015
Posts: 51
Likes: 0
From: calgary
Car: 92 z28 convertible
Engine: 305 tpi
Transmission: 700r4
Axle/Gears: 2.73 to1
Re: AS&M large tube runners
You should port that stuff to match . No down falls. Just smaller gainsif you dont. You can remove tons of aluminum out of these . I just did my intake manifold. And I have a mountain of aluminum that was removed. Its easy but time consuming.
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