I currently have a 383 that puts out 470 horse and 450 ft lbs of torque at the motor. I currently have an edelbrock shorty's with an edelbrock cat back. Its not a true dual exhaust, but its a 3 inch pipe from the headers to the muffler which then splits into 2.5 inch dual after the muffler. Just want to know if this would be to restrictive. Thanks guys

 

Was the engine dyno'd at 470 HP? If so, what exhaust was used to obtain that?

You're probably not making 470 HP with that exhaust, though.

 

It was on an engine dyno. With the shorty headers but not the rest.

 

I assume it didn't got to a single 3" pipe, then.

That's pretty good power for shorties. Most people wouldn't believe they'd do it.

 

Yes its restrictive. Edelbrock's 1 5/8" headers are not good, not to mention they're too small for a 383 anyway. Do a search on the Exhaust forum for Dyno Don Headers and send him a PM.

 

I use this car quite a bit on the street, and occasionally at the strip. So I was wondering what headers would fit without having ground clearance issues. I also wanted to make sure that the headers would just bolt right up like the shorties without having to take the engine out.
So would the 3 inch exhaust from the headers to the muffler, be to restrictive or will that would out ok. Thanks guys

 

My headers and y-pipe with your 3" cat back would be fine.
Most of us here use that setup.

 

What kind of headers do you have for our cars, and do they have any ground clearance issues, and can they be installed without taking the engine out. Thanks Dyno Don

 

Look here & here:

https://www.thirdgen.org/forums/exha...-4-header.html

Copy and paste this one to the address bar.
https://www.thirdgen.org/forums/atta...eaders-w-o.jpg

 

Dyno Don Are you shorty's 1 3/4 with a 3 inch collector, that would be something I am very interested in.

 

with a 383 is 1 3/4 with a 3 inch collector to big or to small

 

Just right