thoughts on my exhaust design on my 87 GMC crew cab long bed dually
 

Thoughts on exhaust design do my 87 GMC crew cab long bed dually with 454
Its start from manifold dual exhaust to 3" pipe to cats from cats to x pipe from to two flowmaster super 44 from mufflers to 3" inch intrets to 4" exit tips the exhaust is go stop in front of the back tires

Re: thoughts on my exhaust design on my 87 GMC crew cab long bed dually
 

Sounds a bit over kill and overly loud, but not too bad. I think dual 2.5" would probably be better. And i bet you would be happier with 50 series.

Re: thoughts on my exhaust design on my 87 GMC crew cab long bed dually
 

Unless its a Built motor that probably going to be too much exhaust. A single 3" is usually plenty on stock or even slightly built motors in my opinion. Single 3" on my 454 trucks.

Re: thoughts on my exhaust design on my 87 GMC crew cab long bed dually
 

3" into the muff's is do-able. Downsize from there (especially if its TBI).