Syfi,
I'll reserve judgement on whether I think he's a 'putts' or not, my quote was my interpretation of his response when I asked about an 'X' pipe, not his exact words. Haven't driven the car on the highway at 50-60 MPH yet.


Anyway, I've done a lot of reading on the benefits of 'X' pipes on V engines (most references focus on differences between the 'H' and 'X' pipes) all have a common theme, they were referring to engines with completely separate/un-connected systems for each bank of cylinders and the 'X' (or 'H') pipe allowed the pulses on each side to mutually support each other and improve scavenging/noise etc. I haven't seen anything that specifically refers to a system like the NA Xfire where the 2 systems join together in a 'Y' before a single muffler. I totally understand the 'X' pipe principle on separate exhaust systems for each bank, just can't see how it would help a system where the 2 sides are joined/linked anyway ?


I'm no expert, just a keen and experienced DIY car/motor-bike mechanic so shoot me down if you are !


If I decide to go down the 'X' pipe route, where is the best position in the NA Xfire system ? I'm guessing, where the sec cats have been removed ?


Anyone got a good photo of an 'X' pipe installation on an NA Xfire ?


Anyone done a before and after dyno run ?


Mick