Quote:
Originally Posted by Road_Warrior85
my question.... yeah its 10 more up at the top.... but as for a primarily street car.... what difference does it make? the lines are almost identical all the way up until over 4k.
For a street only, or almost only street..... where is the real advantage?
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Could air intakes offer similar gains and similar RPMS's and cost $400 or more. The difference between theses stepped headers and the standard 1 7/8" is a bit smaller number.
Here is something else to consider. The exhaust port on the head is less than 1 3/4". So when you have a 1 7/8" or 2" header, the exhaust port is dumping into a header that is immediatly much bigger. This creates turbulance and reduces exhaust velocity. With the stepped header the 1 3/4" initial primary allows for the exhaust gas to transition out the exhaust port in a much smoother manner. And again..it is only 1 3/4" for a very small part of the actually lenth of the primary.