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Joined: Dec 2003
Posts: 275
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2000 Toyota Celica

Joined: Dec 2003
Posts: 275
GA
Jan 13, 12:08am - #81442 
About Headers

Hello Everyone: I am ready to buy headers but don't know which one is good. 4 into 2 into 1? or 4 into 1?

and which brand will gain more horsepower?

Joined: Aug 2003
Posts: 6,372
Speed4TheNeed
Caleb
Speed4TheNeed

Caleb
2000 Toyota Celica

Joined: Aug 2003
Posts: 6,372
New Orleans, LA
Jan 13, 7:27am - #81443 
personally i like 4-1 because it usually has less resistance to airflow and i like the fact that its one piece.

that said, a 4-2-1 isnt THAT much of a difference and the installation is easier because you don't have to twist it in such awkward ways (smaller pieces = less hassle)

so far, trial makes the best horsepower gains (about 11 whp). but its expensive..in the neighborhood of $700. (normal headers can be found for around $500). the price is so steep because trial is a japanese company and you will need to pay destination charges for the product.

that said, dc motorsports is coming out (or has recently come out) with a header for the gts that promises even better gains than the trial and for a cheaper price. worth looking into, in my opinion. thumbsup

Joined: May 2002
Posts: 3,295
Steven
ECelica Staff
Steven
2001 Spectra Blue Mica Toyota Celica GTS
ECelica Staff
2001 Toyota Celica GTS

Joined: May 2002
Posts: 3,295
Riverside, CA
Jan 13, 8:39am - #81444 
Brashboy Japan makes a 4-2-1 header. 4-2-1's are different than 4-1's because of the difference in runner collectors. Some enthuasists choose to have long tube headers which enables you to tune your different locations of your power band which is beyond me.

Originally Posted by sPeEd4tHeNeEd
personally i like 411 because it usually has less resistance to airflow and i like the fact that its one piece.

that said, a 4-2-1 isnt THAT much of a difference and the installation is easier because you don't have to twist it in such awkward ways (smaller pieces = less hassle)

so far, trial makes the best horsepower gains (about 11 whp). but its expensive..in the neighborhood of $700. (normal headers can be found for around $500). the price is so steep because trial is a japanese company and you will need to pay destination charges for the product.

that said, dc motorsports is coming out (or has recently come out) with a header for the gts that promises even better gains than the trial and for a cheaper price. worth looking into, in my opinion. thumbsup

Joined: Feb 2003
Posts: 271
fusi0n
Member
fusi0n
Member

Joined: Feb 2003
Posts: 271
Michigan
Jan 13, 12:22pm - #81445 
4-2-1 = power across the whole powerband

4-1 = high end

Joined: Nov 2003
Posts: 242
hybridcelica
Member
hybridcelica
2000 silver/blue Toyota Celica
Member
2000 Toyota Celica

Joined: Nov 2003
Posts: 242
virgin islands
Jan 13, 8:19pm - #81446 
the celica header is a 4 into 1 design but in actuallity the entire system including the down pipe is a 4 to 2 to 1 design! that is one of the reason the amss header lost power in the low and middle rpm band cause they didnt put in the divider that made the system a 4 to 2 to 1 header! the divider in the down pipe splits the exhaust gases from #1 and #4 cylinder and keep them together away from #2 and #3 the flow of the gases in each runner helps pull the gases of the other runner its paird with in the collector,cause the gases are travelling faster cause of less turbulance from cylinder interferance(scavenging and reversion)and the gases travel faster in two separate smaller section of pipe than 1 big pipe.(more preasure)


HYBRID:resulting from the combination of two or more mechanically dissimilar origins!
"...... code":every man is a shadow,let him be treated as such,until proven otherwise by a show of character or code!
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Jae
2001 Toyota Celica
Palm Springs, Burbank CA

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