hi i have 302 engine and i think over about Intake Manifolds. my carburetor is holley 4150 600 CFM DP . i think about summit Stage 2 \air gap \ Stealth so what are you recommender ?
Really should hear more about your combination Camshaft Compression Heads Headers or Manifolds Automatic or Manual Trans Gear ratio Primary use of vehicle
i would agree with maverick1970 but a good manifold for power is the RPM, and a good manifold for just a daily driver would be performer. but it does depend greatly on your setup
There has been quality issues with the 'Summit' branded manifolds.....Imported! Do a thread search, I think it's been covered here before.
Hard to go wrong with an RPM or Stealth. Some guys swear by the Xcellerator on the street, too, 'cause it's a relatively small single plane. The only measurable difference between an RPM and an AirGap is the price. The Performer is strictly a low rpm range aluminum version of the stock Ford four barrel intake. Obviously your heads and cam need to be a part of the combo.
I like the stealth,works well with mild engines and will still work good if you turn it into a not so mild engine.Mine worked well up to 6200(thats where the heads ran out though,me thinks the stealth is rated up to 6500)
Stealth... (without know more specifics) I see you have a DP carb. If you don't drive the car regularly, have a manual tranny, and decent gears... Then you could use the DP with an X-cellerator and get very good results. If you don't have all of these things, you really would be best off considering a change to a vacuum Holley carb.
