Sounds good on the 1 year warranty.

As far as I know there is not a DS4 that can shove over 90 cube mm of fuel.

There is a lot of Myth and just plain BS out there about all this stuff.

The HO DB2 stuff that Penninsular has to offer is good stuff.
They have gone the extra mile, done the testing on the dyno and can back up any and all claims on what they sell.

Good luck with whatever you decide to do.

The P400 is a good foundation to start with for sure.

Missy