I disagree with PAS, If low end torque is what your after a intake and header, full exhaust could actually hurt low end torque but increase top end *near redline*



If you really want more low end, a very small turbo t-15- to t-20 size would be what you want and a low intercooled 5 psi.

 

Tuning is the key. Header tubes can be tuned for greatest efficiency at a single engine speed and greater efficiency at a certain engine speed range. Headers can be tuned for increased torque down low, increased power at the top end . . . but you don't get to choose unless you design your own headers.



If you DO get an exhaust, chances are your butt-dyno will tell you something good, and you will be happy even if you did lose a couple of % at very low engine speeds.

 

were still talking like a 1-5% difference here. not even worth caring about.

 

doing some weight reduction could help with the feel of the car-... and it's free!



did anybody mention the coolant bypass?

 

I/H/E with 4-2-1 headers netted me 100whp and 109lb/ft of torque at 2200rpm's. My car was rated at 104hp and 106lb/ft at the crank stock. I would call that a nice bump in low end torque. That's something like 128lb/ft at the crank.

 

<-- wonders if you saw a similar bump in fuel economy

 

Yep, a nice bump in fuel economy, about the same percentage probably.

 

What parts did you use for the intake and headers? Was the exhaust custom? 20 HP increase + better fuel economy sounds very enticing.

 

Intake: ebay special 3" diameter short ram with a K&N filter

Header: Evofusion 4-2-1

Exhaust: custom 2.25" crush bent

 

Cam gear. On our cars the external gear acts as if we are a sohc . Which basically will move your powerband into a lower rpm . With a good short ram intake it could get a little better. Honestly ......supercharger is the way to true low end torque from the get go.