I’m running the ‘B’ with the steal belly plates; I can recommend them to anyone, be it for off road. Laning or driving down the motorway.
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If you decide to try an ecotec valve out, be sure to let us all know what its like, the company offer a 30 day return policy if you don’t like it.
http://www.ecotekplc.com/more_cars_11.htm#frontera
The noises you are hearing maybe the exhaust.
The crack in the manifold will need drilling, grinding a v grove then welding.
Or replacing with new.











