Engine Mods - which to do
 

My all new engine is being assembled and will get a T04E with a goal of ~450RWHP. What internal engine mods are worth the money?
(pulled from Pineapple Racing and Jackson Auto)

hardened stationary gears
dowel pins
Lightened Rotors
Engine Mounts
competition oil seal springs
new oil pump w/chain
high pressure oil regulator
competition main bearings
Rotors competition clearanced
oil passages enlarged
Eccentric Shaft is polished
oil jet modifications
Windage Tray / Pan Baffling
-10 oil lines
Increased Oil Pressure
Oil Pump Cavity Port
Enlarged Oil Passage
Loop Line

Car will see some track use (road racing) and autoX.
What RPM limit is feasable?

Mods:
Racing Beat Springs
GAB Super 8-way Adjustable Shocks
Fikse FM5 17x10 rear 17x8.5 front 3 peice forged aluminum wheels
Yokohama Advan A032R DOT legal race tires, 275x40x17 rear, 235/35/17 front
Crossdrilled brake rotors
Braided stainless steel brake lines
Hawk Blue race pads (front, track only)

Corbeau Forza II competition seat (black)
Sabelt camlock 5pt harness (red)
G-Tech Pro performance meter
Boost Gauge
GReddy Turbo Timer
Autopower Chrome-moly race roll bar

Apex Power FC engine management computer with Commander, tuned by XS Engineering with PowerExel
Random Tech. High Flow Cat.
Mindtrain dual chambered resonated midpipe
Custom Downpipe by South Florida Performance
Custom Manifold by South Florida Performance
4" x 12" K&N Filter
PFS Intercooler
C's short throw shifter
GReddy Sport Catback
Engine fully rebuilt with all new parts, street ported, ribbed water passages.
(2)850cc primary, (2)1300cc secondary fuel injectors
Walbro GS255HP intank fuel pump
Turbonetics T04E 60-1 .7 comp 1.15 A/R P-Trim
TiAl 50mm bloww off valve
GReddy Profec A fuzzy logic boost controller
M2 9.5lbs Flywheel
ACT 30% over HD street/strip clutch
GM 3 Bar MAP sensor
8.5mm Magnecore wires
10.5 NKG plugs
Custom 3" Aluminum IC piping
Optima Red Top battery located behind passenger seat, 0/1 gauge wire to fuel pump.
Fully rebuilt transmission with all new synchros, redline fluids

Truthfully, all of them. If you're doing some internal upgrades might as well do them all.

They all contribute to reliability and performance.