Guys I've been researching this forum and yt to find a couple of mods that won't make my 2010 6mt coupe (stock, except I bot the RJM pedal kit) sound like a ricer, no offense, but will add whp/tq. And no, I won't buy new light weight wheels or remove the spare. I think the stock exhaust note on the coupe is fantastic, and exhaust is generally expensive so it makes sense to leave it be, UNLESS someone can prove via before/after dynos that there is an exhaust component that adds say 20-30whp for under a grand, but I don't think it exists. Some say headers give great increases(Stillen says +14whp for headers, +18whp for catback), others say they do basically nothing but add noise. Some say y-pipes, x-pipes, h-pipes, but I'm skeptical they add much power, just noise. Even if headers and complete dual exhaust added say 30whp, I still wouldn't like the sound(except maybe Borla? but so expensive) So I'm thinking only CAI and HFC. I realize these will affect the sound but, seems from what I've read, these prob give the most gains for the $, right? So far, I think I'm leaning towards:

Stillen Gen 3 CAI ($450-$500?)- Seems most prefer this, but the fact it's almost 2014 makes me think there should be a better one by now. If someone can prove there is one that provides more power then post a before/after dyno on here.

FI RHFC ($620?)- I see a lot have Berk HFC but yt shows these are quiter w/ less drone, rasp.

Given my goal, should my plan be to get these or do you have a better plan for me? After a tune, would these give me a 10% power boost over stock? Would it sound more ricer-esque or stock-ish? What do you guys think about this combo? Any downside, longterm, to my G?
Post your dyno on here if you have before/after with these mods. (Just 'after' doesn't help since we don't know the 'before')

Thanks much for your input.

 

Bolt ons will add more sound than hp. That's a fact.

If you're chasing hp, look into forced indcution. A GTM S/C would probably sound stockish until your foot gets heavy.

 

Thanks for the advice, but I'm not looking to spend $6k to supercharge my G right now, even though that would be a freaking blast. Maybe $1000-$1500 to gain some noticeable power via a couple of bolt-ons though, if that's possible. So would a CAI and HFC and a tune be my best bet to do that?

 

$1000-$1500 will not get you noticeable power, it can make you sound like it did, but it simply won't.

 

*10K to supercharge your G

 

Well then, looks like mine's going to remain stock for a while. GoFightNguyen, do you have before/after dynos with your mods? 0-60 or 1/4 times?

 

Nah, I don't drag it. I've been contacting my tuner (Jtran Studios) for a while trying to get my dyno sheets, but they aren't great on replying to requests like that. It's more for personal pleasure rather than bragging rights anyways. If you can take my word for it, I dynoed w/ an uprev tune at 278whp with K&N intakes+current mods, and 319whp with Gen 3's+current mods and a retune.

 

If you dont want to spend that much money, you love the exhaust note....why not just go to a shop and get a larger diameter piping put onto the stock mufflers. Should net you a deeper tone and will be a lot less money than a full exhaust setup from some name brand company. I thought about doing this myself but I may still go with an aftermarket exhaust. I would love to make mine quicker as well but Cali is such a pain in the a$$ about stuff I am not bothering. Simple bolt ons, wheels and a drop...my future plans.

 

So you're saying you gained 41 whp just switching from K&N to Gen 3's??? Were these dyno'ed on the same machine? Or was the 1st tune completely botched? If one could expect those same gains, everyone would have Gen 3's, including me.

Evil, I don't think I'd gain any noticeable performance with just larger piping, so I'm not going to go through the trouble. I'd only add mods if there was a significant gain for relatively cheap (like +41 whp after just a CAI); that would be oh so nice. If I were really after performance I would have bought a Boss 302 instead of a G. But I thought a loaded low mileage 2010 6MT Blue Slate Coupe with OEM lip spoiler was just too freaking gorgeous to pass up.

 

I think the issue was more that the K&N's were not particularly suited to this car. They may provide more flow through the pod filters, but I think the available air to intake was choked through the radiator shroud. I think the K&N's made the car weaker than stock, and the gen 3's improved over stock and allowed the other mods to shine through.

They were dyno'ed on the same machine, by the same guy, <3 weeks apart.

 

why don't you just get a nitrous oxide kit for your car. you can keep everything else stock, a decent kit will run you the same $$$ as you are going to spend on stillen G3 and HFCs but will give you more power while maintaining the stock appearance till you are actually using it.

 

Heard too many headaches related to nitrous. I have a 6mt coupe and am surprised no one has mentioned frontier 4.08 gears. A theoretical 9-10% acceleration gain at the cost of a couple hwy mpg. Sounds like the best option by far and I am leaning heavily toward this. If only someone would post 0-60, 1/4 times using them. Why dont all of us 6mt owners have these gears??

 

Are you trying to be quicker for actual drag or just quicker for butt dynos? Not much to do with these cars, and they don't even respond that well with mods.

Most don't have these gears because most don't drag race.

 

Just quicker. While sounding stock. I will rarely be doing even 80 mph and have never drag raced.

 

hks legamax is the perfect muffler for you but good luck if your willing to pay close to 1 grand. I have it on my g37 sedan i had it shipped over from japan. i would assume your best mods for still making your quiet are

Post MAF TUBES
hypertech power tuner
hks legamax muffler
or maybe a y pipe very minimal on noise.