Who can tell me about it more/less professionally? Now I have 4-2-1 on my car, but "professionals" force me to put on 4-1 for beter hi-end torque.. Anny comments?

 

one header is for high end and the other is for low end ...now you do the math......where ever you neeed power at then yeah..

 

i just put a 4-1 dc header on my car and noticed much better high end power, but it sucks if you are just cruising at 3,000rpm or less. there isn't enough back pressure. i also put a test pipe on too with the catback i already had on the car.

 

Thanks, yesterday I bought stock 4-1 deader + pipe + lambda sensor for only 20$, but what's interesting - it's only 40mm (1 3/4") wide.. Is it enough? I plan to have ~2-2.5" exhaust. Does it work well (talkin' about power) to have header only 40 mm wide?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by peichie &raquo;</TD></TR><TR><TD CLASS="quote">i just put a 4-1 dc header on my car and noticed much better high end power, but it sucks if you are just cruising at 3,000rpm or less. there isn't enough back pressure. i also put a test pipe on too with the catback i already had on the car.
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z

 

how are you hooking up the lambada sensor to the D16a9? im interested to know as i want to add an air fuel gauge to my car but unable to do so ... somink to do with needing a 0-1.0 Volt signal from the ECU which my ECU doesnt have .... any suggestions?