[C25A1guy]

Sorry for not getting in here earlier. The chips from SLR look like snake oil. It's probably going to be one of those stupid little resistor packs that's sold all over ebay. For the price, I highly doubt there was ever much R&D that went into it. For anybody that has tuned their car before on the dyno on this engine, a simple chip that does little to reprogram the base maps for fuel, ignition or cam phasing will make little to no power.

As far as grounding kits go, gains are not very great unless you have something that has a high amperage draw. Even without a high amperage draw, you will still make gains, dependent on where you place the ground straps. I've always been a fan of making my own grounding kits and using a voltage stabilizer in conjunction.