Just how much power different is there between the two intakes...

 

For gods sake will some administrator post a sticky on this topic.

 

Absolutely none. The LT4 runners are a little longer, that is virtually it.

Next time, SEARCH before asking. 99% of everyone's questions have been covered.

 

If you have problems with the moderators or administrators, or have a suggestion for improving the forums, please either take it up in a PM, or use the site suggestions forum. A post like this does not help anything.

 

I've never seen a ported LT1 head outflow an equally ported LT4 head. Highest I've seen LT1 heads flow is 280's, while the LT4 heads flow about 300's, so while the intake manifolds are virtually the same, they exclusively fit their heads (LT1 intake doesn't mate up to LT4 heads), and if one set of heads flows better than the other, then one intake/heads setup will outflow another...