HFC + OEM exhaust Question
#17
I drove ttrank's car solo
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G35 sedan w/ too much money in mods
#18
Apparently HFC are the best "bang for the buck" keeping stock-ish sound & emissions, however lcysimon mentioned there are no HFC's with 2" inlet/outlet for the OE exhaust.
What to do?
#19
I'm in the same boat. I want to keep my exhaust sounding close to stock, but I also want to open it up a bit to complement the intake improvements (and eventually get it all tuned).
Apparently HFC are the best "bang for the buck" keeping stock-ish sound & emissions, however lcysimon mentioned there are no HFC's with 2" inlet/outlet for the OE exhaust.
What to do?
Apparently HFC are the best "bang for the buck" keeping stock-ish sound & emissions, however lcysimon mentioned there are no HFC's with 2" inlet/outlet for the OE exhaust.
What to do?
#21
Regardless of what Y pipe you use with the OE exhaust, you will run into this issue... Say you get the MD xyz pipe 2.5" inlets and 3" outlet, the OE mid pipe is still 2.5".
So whether it be the HR Y pipe or an after-market Y pipe, you will run into a 2.5" problem unless someone makes a 2" hfc or a 2.5" overall HR Y pipe.
But as mentioned earlier, perhaps the OE mid pipe will resolve the 2.5" to 2" HR Y pipe rasps.
But at the end of the day, opening up headers (I.e. My case of swapping on OE HR headers) would not be as effective since the Y pipe doesn't open up enough...
As such, it goes back to my dilemma / question...
Will OE HR headers+OE cats+xyz pipe+ Nismo S tune make more power or OE HR headers+FI HFC+ HR Y pipe+OE exhaust make more power.
Help me out and I shall buy you coffee
So whether it be the HR Y pipe or an after-market Y pipe, you will run into a 2.5" problem unless someone makes a 2" hfc or a 2.5" overall HR Y pipe.
But as mentioned earlier, perhaps the OE mid pipe will resolve the 2.5" to 2" HR Y pipe rasps.
But at the end of the day, opening up headers (I.e. My case of swapping on OE HR headers) would not be as effective since the Y pipe doesn't open up enough...
As such, it goes back to my dilemma / question...
Will OE HR headers+OE cats+xyz pipe+ Nismo S tune make more power or OE HR headers+FI HFC+ HR Y pipe+OE exhaust make more power.
Help me out and I shall buy you coffee
#22
#23
#24
#25
Looking to get a Stillen catback exhaust, and wondering what (if any) issues I"ll have bolting up to stock cats.
Tony's fairly smart. Not quite "accountant" smart, but not bad for a rocket scientist
#26
Regardless of what Y pipe you use with the OE exhaust, you will run into this issue... Say you get the MD xyz pipe 2.5" inlets and 3" outlet, the OE mid pipe is still 2.5".
So whether it be the HR Y pipe or an after-market Y pipe, you will run into a 2.5" problem unless someone makes a 2" hfc or a 2.5" overall HR Y pipe.
But as mentioned earlier, perhaps the OE mid pipe will resolve the 2.5" to 2" HR Y pipe rasps.
But at the end of the day, opening up headers (I.e. My case of swapping on OE HR headers) would not be as effective since the Y pipe doesn't open up enough...
As such, it goes back to my dilemma / question...
Will OE HR headers+OE cats+xyz pipe+ Nismo S tune make more power or OE HR headers+FI HFC+ HR Y pipe+OE exhaust make more power.
Help me out and I shall buy you coffee
So whether it be the HR Y pipe or an after-market Y pipe, you will run into a 2.5" problem unless someone makes a 2" hfc or a 2.5" overall HR Y pipe.
But as mentioned earlier, perhaps the OE mid pipe will resolve the 2.5" to 2" HR Y pipe rasps.
But at the end of the day, opening up headers (I.e. My case of swapping on OE HR headers) would not be as effective since the Y pipe doesn't open up enough...
As such, it goes back to my dilemma / question...
Will OE HR headers+OE cats+xyz pipe+ Nismo S tune make more power or OE HR headers+FI HFC+ HR Y pipe+OE exhaust make more power.
Help me out and I shall buy you coffee
#28
The OE Y pipe inlets are 2.25" so you only have a .25" difference. I guess most people just bolt their 2.5" HFC to that. I'm wondering how that's possible without any problems? I know people do it but never heard of anyone complaining about fitment of HFC to OE exhaust. I'm wanting to put my OE exhaust back on and keeping the Berks HFC. Does this require some type of modification?
#30
Old video of mine. First part is my car with the HR y-pipe and Fast Intentions HFC's.
http://www.youtube.com/watch?v=WQKef2GxHYs&sns=em
http://www.youtube.com/watch?v=WQKef2GxHYs&sns=em
Btw, really like the Motordyne sound. Not bad at all.