timing Q...

[84slopwaggin]

Don't worry much about the 2.25 pipes. They are adequate for stock applications. Probably the only difference you'll notice is the sound of the exhaust. It could hurt low speed torque. 2.5 would be adequate for mild big blocks.

[piecesparts]

Originally Posted by 84slopwaggin

Don't worry much about the 2.25 pipes. They are adequate for stock applications. Probably the only difference you'll notice is the sound of the exhaust. It could hurt low speed torque. 2.5 would be adequate for mild big blocks.

I think that the 3" pipes will be too much, also. For a modified SBC motor (such as a 383 stroker) and a stock BBC 2 1/2 pipes are the border line. Anything past that will hurt low end performance, unless the motor has been worked over. If you want to upgrade, then look at putting on a 2 1/2" set at the most, but concentrate on things like style of mufflers, "X" cross-over, and mandrel pipe bends instead of standard muffler shop bends. All of this will upgrade you by giving you the best flow possible.