OEM: tri-y design, oval primaries 44mm W x 37mm H, long secondaries. Overall nice design for OEM, but not the cleanest or nicest bends by any means. Stock.
Amuse R1: tri-y design, 10 lbs, it is the lightest header for the S2000. Gains of over 10hp mid range and 2-5 hp peak (manufacturer claims). ~$1600
ASM : 4-1 design, 48mm primaries, 65mm collector. No known dyno plots though, but it IS on the ASM S2000...~$1500
Maxim Works / Feels Header: 4-1 design, long primaries, no know dyno's. ~$1400
Fujistubo Super Ex: tri-y design. 45mm primaries. 10 lbs weight savings, 8 hp gains (manufacutrer claims). ~$800
Fuji Racing tri-y design, 9lbs total weight. Still in prototype. ~$500.
J's SPL: tri-y design, equal length 50mm primaries, 55mm secondaries, 65mm collector. Solid, healthy gains across the entire powerband. +5 hp peak, +14 midrange hp @ 6200 proven when added to an existing high performance exhaust. Dyno sheet courtesy of Rfever here:
http://www.s2ki.com/forums/index.php?act=m...mage&img=378160
+2 hp peak, +7 hp @ 6200 when added to a completely bone stock AP2. Dyno sheet courtesy of AP2_S2K here:
http://img.photobucket.com/albums/v312/dro.../DynoLabled.jpg ~$1200
Mugen: tri-y design. 45mm primaries. 10hp@6000rpm, little to no peak HP Gain. Weight savings: Approx 10lbs (manufacturer claims). ~$1300
Mugen AP2: tri-y design. Weight savings: Approx 10lbs (manufacturer claims). 6-7 hp from midrange to peak. Dyno provided by MugenRioS2k here:
http://www.s2ki.com/forums/index.php?act=m...mage&img=367633 ~$1300
Toda: tri-y design. 45mm primaries. Healthy mid range hp, dyno here:
http://www.p1auto.com/jack/s2k/justinstockvheader.jpg ~$1100
Tracy Sports:tri-y design. Primary=45mm, Secondary=51mm, Collector=60mm ~$1200 Max gains of 8.5 hp @ 6000 rpm and 6.5 ft/ lbs @ 6800 rpm, with peak gains of 4 hp and 4.5 ft/ lbs at redline. Dyno comparison courtesy of ebeldesign here:
http://www.s2ki.com/forums/index.php?act=m...mage&img=389461
Comptech: 4-1 design. CARB legal. Manufacturer provided dyno comparison here: =http://www.comptechusa.com/store/media/dyno/s2kheader-comparison.pdf ~$900
Megan: Tri-Y design. 2" primaries, 2.5" out. Manufactured claims of improved upper mid to peak. ~$400
Berk Technologies: Tri-y design. 50mm primaries. 11.5 lbs. total weight. 6-7 hp gains peak in combination w/ test pipe (so far). ~$600
Rick's: tri-y design. maximum gain of six horsepower at 6200 RPM. Torque increases of about 3 or 4 were also achieved, along the same range as the horsepower gains. Like the Mugen header, horsepower with Rick’s 6 Plus header trails off at about 7600 RPM (manufacturer claims). Weight: 12.8 pounds
DC Sports: 4-1 design. 45mm primaries. 1-3 hp gains across the RPM range, dyno provided by Import Tuner Magazine: Here ~$400.
T1R: tri-y design. Equal length 48mm primaries, 55mm secondaries connects to 65mm collector. Still in development.
Spoon: tri-y design. 45mm primaries. Reduced weight by 3.8kg. Loss of 3 hp, 2 ft.lbs peak, even more in the rest of the powerband. Dyno comparison courtesy of RXDI here:
http://www.s2ki.com/forums/index.php?act=m...mage&img=386471 ~$1300.
Hytech: Big money. Big gains. Custom applications. ~$1500 and up.
5zigen tri-y design. 42.7mm primaries - 50.8 secondaries - 60.5mm out. Manufacturer claims mid to high hp gains. ~$700
OBX tri-y design. Cheapest of the cheap. They claim 7-10 hp gains. I don't believe them. ~$200
RS-R: tri-y design. 45mm primaries. ~$700
HKS: 45mm primaries. Need to research this header still.
Стырено с s2ki
