PPE header w/ PPE Exhaust 2.5" system or Greddy TIC 3"

[smart_rocket]

hey 2zz masters,

may I ask you, what will be better for the bucks vs. flow potential...

My final setup will be a non-stroked Rotrex setup at around ~14-17psi and 8300RPM... I made freaking 40k miles in one year, that's why I decided to build the engine before putting the charger on it.

Shall I go PPE header and buy the whole PPE exhaust system with high-flow cat and resonator...
pro: no custom fabs required, no additional costs
contra: only 2.5" diameter w/o tail pipe...

Or

Shall I go PPE header w/o PPE exhaust system and buy the Greddy TIC 3" diameter exhaust system
pro: 3" diameter, tail pipe incl.
contra: need additional high flow cat, custom fab from header to cat

I read in the net, there's a rotrexed VR6 with only 2.5" diameter exhaust system doing over 300hp easily... but heard in these forums, the PPE exhaust routing isn't the most efficient one...

thanks

[dead_star04]

go with the ppe mid pipe. no cat is best, but for emissions youll want a high flow one. greddy tic, as far as i know, is only made in 2.25 inch setup (same as magnaflow). i would build a custom axle back, using 2.5 inch mandrel bent piping. theres no point in keeping your stock mid pipe if your going to build the block and go with a rotex. your spending cash on performance, dont kill it with the stock mid pipe

[Gtsjeg04]

I would figure the size of the collector outlet on the PPE header, and then bolt up a straight pipe all the way back the same size as the outlet, manderal bending where ever you need to with muffler at the end. No cat, no resonator, no restrictions.