they have plenty of dyno charts from other applications
on their site
(helix's site) Street and Performance...
anywhere from 8-28 hp depending on vehicle
so even if our cars got 5-8 hp, which is very plausable
then imho its worth the $. If we got more, great.

Plus anyone who believes in a product, just because of the
dyno sheet and not there to monitor how it was done, is kidding
themselves.
Personally, I test my stuff, on the street against an actual
other vehicle.
4 races, 2 prior to the part installed
2 after.. racing the same car. Both autos and similar in
size, motor etc.
And see what the end results are on the street (or frontage
rd in our case).
It either that or take it to the track for some passes before
and after. Which makes more sense and are actual results.

I dont offer parts I dont personally try and or have tried or believe in.