[MrBlonde]

When looking at the performance modifications I have made (related to engine output), I'd like to spell out the outcomes for those who are pondering purchases for their 135.

1. PROcede V4 Piggyback computer. Cost: ~$1,250 installed. Gains: 62 rwhp. Value: $21/rwhp

2. Vishnu Progressive Methanol Kit with dual D04 nozzles. Cost: ~$1,250 supply parts only. Gains: 44 rwhp. Value: $29/rwhp

3. Full boltons, all installation costs, etc. Cost: $11,338 Gains: 33 rwhp. Value: $344/rwhp

+ VP MS109 Race Fuel. Cost: ~ $10/litre. Gains: 6 rwhp. Value: Poor.
+ VP M1 Methanol. Cost: $92.40 for 5 gallon (19 litre) drum.

Conclusions for would-be modders. Well I think it's pretty obvious that your best mod path would be as follows:

PROcede V4 with latest tune plus Vishnu Progressive Methanol Kit. This gets you something like 100+ rwhp at a cost of ~$2,500.

If you wanted to spend some more money then I'd say go with catless downpipes, this will free up some power and make better noise, along with better response. All the other boltons will add a bit of power but basically you're chasing the dragon's tail by then.

A full exhaust system gives you that sound you want but again the power improvements are not the same value for money.

For best bang/buck just talk to Adrian at Vishnu Australia for a PROcede and a meth kit and be done with it.