will a stock alluminum intake perform better than a stock cast iron intake

thanks, keith

Depends on the years of the intakes, what they came off of, etc. Do you have any of that info? You'll obviously save weight with an aluminum piece, but the applications are what ya need to know...

I've had both intakes and they look as if they were cast from the same mold. You can very much improve either intake. I'd start with the aluminum one, then put a huge radius on the bottom of the plenum where it turns to go to the runners. It's a perfectly sharp edge there. Also use a 1 inch open spacer, and blend out the divider between the small and large holes on both sides but leave the center divider and taper it to almost a sharp edge. Major improvements for just the investment of a cutter!

FWIW, a stock, cast-iron,Q-Jet intake is the best there is up to about 3500/3700 rpm or so!!

You might be able to create more lowend torque using an old E-brock, SP-2P, dual plane if your motor combination is right-on, but it won't rpm as high as the stock, Q-Jet intake which will go above 5,500rpm easy!!

pdq67

Are you buying the stock alum intake?
Heck around here you can go to most Hi-perf. shops and they have used performers or RPM's
for $30-$75 bucks not really worth the trouble of changing to go from stock to stock in my opinion.