When will OBX's be not enough?
10-31-2010, 02:47 PM
#32
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Stock converter and 3:42s... just sayin...
Back on track i do believe the primaries are smaller but sypposedly the 6.2 version is 1 3/4... fwiw they really are a nice set of headers...
Back on track i do believe the primaries are smaller but sypposedly the 6.2 version is 1 3/4... fwiw they really are a nice set of headers...
10-31-2010, 04:37 PM
#37
but...
All I know is that they are "EBAY auction advertised" as 1-3/4" INSIDE DIAMETER, and that is 100% INCORRECT.
Inside Diameter: 1-5/8"
Collector Size: 2.5"
Y pipe: 2.5" pipes to 3" merged outlet
As for the "small" 2.5" collectors...if you run a single 3" I pipe (like stock-type), or 2.5" true duals, than what is the reasoning for a bigger collector anyway? I don't understand the logic of 3" collectors into 3" Y pipe, that "merges" into 3" single pipe? That's the setup probably 90% of us with a longtube header (with 3" collectors) V8 LSx powered vehicle has, and if you think about it, it doesn't really make sense. I'd bet that milder combos actually run better with the smaller collectors/smaller primaries since they have a better transition into the remainder of the exhaust, instead of the obvious bottleneck a 3" collector/3" Y into 3" single setup has. JMO...
10-31-2010, 05:54 PM
#38
I measured mine (exactly 1-5/8" INSIDE DIAMETER) in my Ebay header thread, but Matt from Texas Speed replied about 15 pages in, that header primaries are measured from the outside????? No solid definitive answer anywhere that I could find....
but...
All I know is that they are "EBAY auction advertised" as 1-3/4" INSIDE DIAMETER, and that is 100% INCORRECT.
Inside Diameter: 1-5/8"
Collector Size: 2.5"
Y pipe: 2.5" pipes to 3" merged outlet
As for the "small" 2.5" collectors...if you run a single 3" I pipe (like stock-type), or 2.5" true duals, than what is the reasoning for a bigger collector anyway? I don't understand the logic of 3" collectors into 3" Y pipe, that "merges" into 3" single pipe? That's the setup probably 90% of us with a longtube header (with 3" collectors) V8 LSx powered vehicle has, and if you think about it, it doesn't really make sense. I'd bet that milder combos actually run better with the smaller collectors/smaller primaries since they have a better transition into the remainder of the exhaust, instead of the obvious bottleneck a 3" collector/3" Y into 3" single setup has. JMO...
but...
All I know is that they are "EBAY auction advertised" as 1-3/4" INSIDE DIAMETER, and that is 100% INCORRECT.
Inside Diameter: 1-5/8"
Collector Size: 2.5"
Y pipe: 2.5" pipes to 3" merged outlet
As for the "small" 2.5" collectors...if you run a single 3" I pipe (like stock-type), or 2.5" true duals, than what is the reasoning for a bigger collector anyway? I don't understand the logic of 3" collectors into 3" Y pipe, that "merges" into 3" single pipe? That's the setup probably 90% of us with a longtube header (with 3" collectors) V8 LSx powered vehicle has, and if you think about it, it doesn't really make sense. I'd bet that milder combos actually run better with the smaller collectors/smaller primaries since they have a better transition into the remainder of the exhaust, instead of the obvious bottleneck a 3" collector/3" Y into 3" single setup has. JMO...
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