2.25" or 2.5" - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

drkpnoy · 07-31-2002, 07:37 AM

Hi, I'm planing on having a muffler shop do a custom exhaust system for my 95 240. I plan on having piping from the cat to the muffler. My friend told me to go with 2.25" piping but I see that plentyof 240SX owners have 2.5" piping. My question is whether to go with the 2.25" or the 2.5" piping. I have no other mods so far but I plan or keeping it "NA." My mods in the future would inlude the typical intake system and headers. What would be best for my situation? What is the advantages and disadvantages of both 2.25" and 2.5" piping. I plan on having the exhaust done in the next 7-10 days.  Any suggestions would be appreatiated.

AKADriver · 07-31-2002, 08:18 AM

2.5".  For a mandrel-bent system, 2.25" might be good, but with crush bends from a muffler shop... 2.5".

BlackFox · 07-31-2002, 11:30 AM

2.5 is good. You won't lose your torque and you will open up your high end. I'm actually going 80mm piping (3 1/4) on n/a now and the rep from JIC said that you do lose torque but the hp you gain up high will make up for it. I plan to turbo anyways so it'll be a good exhaust for me.

Oh, incase you're wondering, the exhaust is the Ings Z Power
80mm pipe, 150mm can, 115mm tip. Cat back, no resinator just pipe

uiuc240 · 07-31-2002, 11:40 AM

</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (BlackFox @ July 31 2002,12:30)</td></tr><tr><td id="QUOTE">2.5 is good. You won't lose your torque and you will open up your high end. I'm actually going 80mm piping (3 1/4) on n/a now and the rep from JIC said that you do lose torque but the hp you gain up high will make up for it. I plan to turbo anyways so it'll be a good exhaust for me.

Oh, incase you're wondering, the exhaust is the Ings Z Power
80mm pipe, 150mm can, 115mm tip. Cat back, no resinator just pipe</td></tr></table><span id='postcolor'>
whoa dude!  That's gonna be HELLA loud.  No resonator?  And you don't have a turbo yet?  3+"!!  Wow.  Time to get ready to pay tickets!  And I thought my N1 duals were loud before the SR.....

Eric

07-31-2002, 11:30 AM	#3
BlackFox Zilvia Junkie Join Date: Feb 2002 Location: San Jose, CA Posts: 534 Trader Rating: (0) Feedback Score: 0 reviews	2.5 is good. You won't lose your torque and you will open up your high end. I'm actually going 80mm piping (3 1/4) on n/a now and the rep from JIC said that you do lose torque but the hp you gain up high will make up for it. I plan to turbo anyways so it'll be a good exhaust for me. Oh, incase you're wondering, the exhaust is the Ings Z Power 80mm pipe, 150mm can, 115mm tip. Cat back, no resinator just pipe __________________ Current Cars: 1976 Mercedes Benz 300D 1995 240sx SE aka Kate (winner: Best Stock S14 @ 2002 National Convention) http://community.webshots.com/user/jeff976cal If you're interested in parts email me [email protected]

07-31-2002, 11:40 AM	#4
uiuc240 Nissanaholic! Join Date: Apr 2002 Location: Naperville, IL Age: 45 Posts: 2,093 Trader Rating: (0) Feedback Score: 0 reviews	</span><table border="0" align="center" width="95%" cellpadding="3" cellspacing="1"><tr><td>Quote (BlackFox @ July 31 2002,12:30)</td></tr><tr><td id="QUOTE">2.5 is good. You won't lose your torque and you will open up your high end. I'm actually going 80mm piping (3 1/4) on n/a now and the rep from JIC said that you do lose torque but the hp you gain up high will make up for it. I plan to turbo anyways so it'll be a good exhaust for me. Oh, incase you're wondering, the exhaust is the Ings Z Power 80mm pipe, 150mm can, 115mm tip. Cat back, no resinator just pipe</td></tr></table><span id='postcolor'> whoa dude!  That's gonna be HELLA loud.  No resonator?  And you don't have a turbo yet?  3+"!!  Wow.  Time to get ready to pay tickets!  And I thought my N1 duals were loud before the SR..... Eric __________________ 2002 Mazda Protege5 1989 S13 w/SR20DET (sold)

07-31-2002, 07:37 AM	#1
drkpnoy BANNED Join Date: Jul 2002 Location: Socal Posts: 54 Trader Rating: (0) Feedback Score: 0 reviews	Hi, I'm planing on having a muffler shop do a custom exhaust system for my 95 240. I plan on having piping from the cat to the muffler. My friend told me to go with 2.25" piping but I see that plentyof 240SX owners have 2.5" piping. My question is whether to go with the 2.25" or the 2.5" piping. I have no other mods so far but I plan or keeping it "NA." My mods in the future would inlude the typical intake system and headers. What would be best for my situation? What is the advantages and disadvantages of both 2.25" and 2.5" piping. I plan on having the exhaust done in the next 7-10 days.  Any suggestions would be appreatiated.

07-31-2002, 08:18 AM	#2
AKADriver Post Whore! Join Date: May 2002 Location: Springfield, VA Age: 42 Posts: 3,477 Trader Rating: (1) Feedback Score: 1 reviews	2.5".  For a mandrel-bent system, 2.25" might be good, but with crush bends from a muffler shop... 2.5".