best headers for the 5s-fe

[TCam01]

Ive been looking at a few headers and just cant figure out which ones would give me the best performance gains here are some examples of what I've been looking at. Btw are 4-2-1 better than the 4-1 for the 5s-fe?

http://www.ssautochrome.com/level.itml/icOid/1430

http://cgi.ebay.com/ebaymotors/Toyot...mZ170515905900

[chronoti]

http://cgi.ebay.com/ebaymotors/91-94...Q5fAccessories

these

4-1 would be the best if you plan on NEEDING a higher flow exhaust i.e. supercharger, cams, 10k red line (yes can be done, not by any means easy or worth the money), or else the 4-2-1 would work fine.

also see if Portugal had any headers come in the yard

[LynchburgCSI]

FYI- The 5s-fe NEEDS a restrictive exhaust to create back pressure to have decent low end torque. Replace the HEADER (singular... there's one ONE HEADER on a 4cyl engine) and you'll lose your low end torque. Yes you'll gain a bit of high RPM horsepower, but I don't think it's worth it.

[sc2dave]

Originally Posted by LynchburgCSI

FYI- The 5s-fe NEEDS a restrictive exhaust to create back pressure to have decent low end torque. Replace the HEADER (singular... there's one ONE HEADER on a 4cyl engine) and you'll lose your low end torque. Yes you'll gain a bit of high RPM horsepower, but I don't think it's worth it.

Almost all headers are sized for high-rpm, racing engines, and they are almost never sized for a street engine.That's why you lose low-end power,the tubes are too big and you lose exhaust velocity.Now if you had the right sized tubing matched for the rpm you want to run at, then you wouldn't need"back pressure".It's ALWAYS a trade off.I don't think you can have an n.a. engine that has strong low end,and strong top end.I have NEVER seen any type of gragh,dyno run,test where a formula was made for the amount of back pressure is needed for an engine.

[Rickrpose]

so i guess its not worth puting headers if you dont have a manual trany, turbo or SC?

[sc2dave]

It depends on what you have in your engine,your intended rpm range,etc...

[LynchburgCSI]

Originally Posted by Rickrpose

so i guess its not worth puting headers if you dont have a manual trany, turbo or SC?

Manual tranny has nothing to do with it. For the 5S-FE... I wouldn't put a high flow HEADER (singular) on unless I was under some kind of forced induction setup.

[quangtran89]

I used the eBay 4-1 header when I was running nitrous.

[LynchburgCSI]

Okay, I wouldn't put the header on unless I was under forced induction or nitrous.

[bigbird]

as stated before, the headers do little without some sort of power adder to take advantage of the extra flow. however, if you are planning on building a full exhaust, converting ALL components for high fow then you will feel the differance.....and hear it. other then that, its purely cosmetic.

[quangtran89]

You can do a rebuild with forged internal, cams, pulley, port and polish, with direct port nitrous. After that the header will be very noticeable. All that will cost about 900- 1100 in parts.

[eyeball96]

Originally Posted by LynchburgCSI

Manual tranny has nothing to do with it. For the 5S-FE... I wouldn't put a high flow HEADER (singular) on unless I was under some kind of forced induction setup.

This business that sell them call them Headers

http://www.car-stuff.com/store/?Ntt=...963369%2B11784

[LynchburgCSI]

Originally Posted by eyeball96

This business that sell them call them Headers

http://www.car-stuff.com/store/?Ntt=...963369%2B11784

Not to start a huge arguement... but on a 4 cylinder engine, we have exhaust manifolds? It's a manifold. Singular. Same as a header.

[chronoti]

unless it of a split design ....... or a boxer engine..... or a v4 (yes they do exist)

[LynchburgCSI]

99.9% of people don't know that Saab had those V4's back in the day. Split designs are rare, but yes, the do exist. Boxer engines... eh. Not exactly Subaru land here, but hey. Use the right terms per the engine.