Chasing more power - 106 1,3 Rallye

[steffeen]

Hello!
I have a Peugeot 106 1,3 Rallye Gr. A for rally in Denmark which have a DTA box, catcams, air filter and exhaust fitted.

The car have 118,8 HP and 116,8 Nm, but I’m chasing some more.

I’m looking to put a 4-1 manifold on the car and have been looking at a Raceland stainless steel, and this one from TA-Technix.

Anyone who has experience with these manifolds, will they give anything to the car, how much can I expect?

And what else can I do to the car, to get some more power?

[Chipwizards]

Do you want to keep to Gr-A rules?
If not you could fit throttle bodies, a more aggressive cam and higher compression pistons. 160 hp is possible from a highly tuned one, but 9000 rpm is required to get it.