Has anyone fitted either the Mantzel powerbox or Dbilas Flowtec inlet manifolds to an X16XE Corsa?
The suppliers claim 20BHP plus 20% extra low down torque - are these claims correct ?
Are either item worth the cost ?
Are they an easy DIY fit or is it Courtenay / Regal to fit ?
With the manifold changed does it require a superchip or uni-chip to ensure correct fuelling etc ?
I would appreciate any information relating to manifold changes, power and torque figures from rolling road set ups would be nice. Unfortunatley TB's are out of the question due to cost and her indoors says NO !!
Thanks in advance