Hiya Mate,

I have a ShawSpeed built engine, im running SS4's and a few other bits.

Id start with a full exhaust system and a manifold. Dont waste your money on Bluefin, espc if your going down the route of cams, a remap suited to your engine would be much better.

The 170bhp kit from ShawSpeed is based on being used in a kit car with a different exhaust etc... You should see about 140-150bhp in yours i believe, i made 137bhp with just a chip on mine.

To get more power from there your looking at a set of Throttle bodies and management, maybe some headwork too, Jon does alot of different cams for the SE from Mild to Wild.

I personally wouldnt waste my money on different spark plugs and leads etc... standard will do just fine.

Edit: Sorry mine made 134bhp, different person same spec made 137bhp on same rollers same day, got them mixed up.