How much performance gain from headers ??

[jondee86]

Yup... I have looked at those product specifications. This is a 4-1 design,
and the 4-1 design is known for making extra power at high rpm, while
losing power below 4000 rpm.

Such a design is less suitable for a street driven car.

Still, it shows >5% increase at the top end which would be a good result
for such a header. On the Toda site it says that their 4-2-1 design
achieved almost the same peak power as their 4-1 design, with 15%
more torque lower in the rpm range. I would like the Toda 4-2-1

However, the Toda piece is expensive !!!! For this reason I am trying to
establish if the HKS header would have a similar result for less money ??

Cheers... jondee86