DE Rocks With Right Parts & Tune
Hey brother no worries. I've been building my 04 6MT/DE Coupe on a budget for years. It's a great motor, a serious rocketship. I've raced nearly everything including v8's and done very well, always made a good competitive race. I'd go to all the best parts outlets and sign up on their email list so when they get to the end of a run they'll have blow-out sales. I got, my Stillen Flywheel, Z1 clutch, and StopTech Rotors half price that way.
Here are some tips for budget power building, these are expert-proven parts, not expensive and work well together. All recommended by Fontana Nissan Race Team:
1-Intake. I have Injen, but any quality intake will work well.
2-NWP 75 MM Throttle Body-great power increase, especially at high RPM $350 bucks and worth every penny.
3-Plenum spacer, there are many, most will work well. Some better than others but not that much better so you can buy a less expensive one and still gain power, I have the Motrodyn.
4-Fontana Nissan Race Team recommended I add a Motordyne MREV2 lower intake manifold. I haven't yet, and I'm not missing it.
5-You've already got headers and exhaust, just be sure you've replaced the stock y-pipe as it's a serious bottle-neck.
6-Test pipes might be an option for you, not me, I'm in CA.
7-BE SURE YOU GET A TUNE! With all these parts the car will run lean, hot and could detonate and damage your engine so get a quality tune. Don't ask your tuner for peak HP, this set up and DE engine is capable of pulling hard and smooth from 3,500-7,000 RPM safely all day long. Ask the tuner for that and you'll be all smiles on the road. Peak HP doesn't = acceleration which is what turns fast lap times.
8-Check and be sure your oil pump is not the old DE, it's weak and could cause you problems. If it is, unfortunately, you'll need to upgrade that to the uprev oil pump which can be found OEM new at Z1 Motorsports pretty reasonably priced.
9-Lightweight flywheel & clutch kit rocks! The difference is pretty big.
10-Probably need an Accusump oiling solution if you're gonna bang hard on the car in the turns, it will lose oil flow to the pickup, not OK.
11-Energy Suspension bushings will maintain wheel alignment in high-speed turns creating a lot of stability, and it will increase your corner entry speed significantly and an entire set is like 30 bucks.
Removing the old bushings on your control arms isn't easy, but this is a really cheap way to significantly improve handling.
That's as far as I've gotten on my G, good luck.