okay i know u guys get questions for headers and y pipe all the time but here goes....if the stock y pipe is 2.25 inch why do they make mostly 2.5 inch ones it seems like thats not much of an improvement??? and im thinking im goin w/ the headman long tubes cause my car is not lowered and i shouldnt have too much of a problem.. am i right in thinking that lt will help more low end and shorties more up top cause where i only have a 305 i need to not loose anything down low at all. also will i need new brakets of some sort for alternator and ac w/ these headers or no. if i got a 3 inch y custom would it not clear the crossmember and cause even worse ground clearance that the lts? what should i do just go w/ the 2.5 inch pipe or go w/ a 3 inch. also i will be putting some home ported 081 heads and a mild cam in w/ about the same lift and duration as the lt1 cam or a lil bit more, and an intake since i only have the 305 either should be sufficient or no?? thanks guys and sorry if this is a redundant questions for u but ive read many posts and have found some stuff usefull but not a sure answer for all i have asked.

 

You may not have enough flow to really make full use of the LTs but they definitely won't hurt (the coming from someone that had a 305 with Long Tubes very recently).

 

what did u do for the y pipe and how was your ground clearance??? was i right then about shorties making u loose some torque but gain hp up top and lt helping more at bottom than at top??

 

oh and i already have a 3 inch cat back to flowmaster 80 series so any y pipe would have to be a 3 inch out

 

anyone else care to chime in on this one for me please

 

Because they're 2.5 inches from each side into a 3 inch collector. 2.5 inches per bank of 4 cylinders is enough exhaust flow to support 450 hp.

LTs will improve the entire curve more than shorties will. So in other words, you will not loose anything except a couple more bucks and some ground clearance by going with LTs, but you'll have alot more hp/tq compared to shorties.

Check with the manufacturer, but I would highly doubt it.

Go with the 2.5 inch Y-pipe into a 3-inch collector, for reasons stated above.

Don't quite understand your question here?

Thats what we're here for, but make sure to as well.

 

yes i did an abundance of searching but didnt come up w/ much on the brakets and some other things...anyone know if there is a y pipe made to go w/ the lt or would i just be better off goin w/ a custom one??

 

The manufacturer should sell one specifically made for their headers.