What's the expected gain in HP with simple bolt ons such as Evo Intake and Cargraphic exhaust on the 997.1 C2S?

 

Let's say this...

GT3 TB
84mm Plenum
200 Cell XPipe Cats
Muffler Bypass
X51 Carbon Fiber Dual intake
X51 Headers

Total: probably 15 HP real increase.

 

Joe thats alot of coin im sure for 15hp sux but its the truth im sure tge car sounds mean though thats a +

 

no matter what bolt-ons, the answer is "probably not worth the $". if you want return on your investment buy a GT3 or, on the fringe of options, install a TPC turbo. of course, this advice coming from a guy who stubbornly refuses to get off the slippery slope of money-wasting track mods instead of getting said GT3.

 

When I modded my 997.2S, I got all kinds of input and very little of it was consistent...... That is the only truth. I came to the conclusion of not caring of the hp gain but more of the butt dyno and exhaust sound gain that I got. When I had all 4 mods on my car, I got 0-60 in 3.6seconds per my VBOX. When I sold the car I put back to stock everything but left the softtronic tune on it, the 0-60 time was 4.2 seconds(on the same street) and it sounded so quiet and sad. That to me was enough to make it worth it.
The best bolt on was the IPD plenum ($950)and tubi race exhaust($3300). The sharkwerks cold air intake($650) was cool and helped the sound but probably felt the least on the butt dyno.
Hope this helps.

 

can someone explain how the muffler bypass pipes work on our cars? does it circumvent the mufflers all together?

 

Yes, your exhaust will go from the Headers to the cats and straight out.
Not for everybody... but in my case, I love it. I just drove from Ft Lauderdale to Key West... with my girlfriend and she didn't complaint... but I hear people saying the PSE is too loud! LOL!
as an added bonus, when you are shifting from 2nd gear to 3rd and you floor it, it will shoot out flames...

 

I did my bolt ons as an enhancing to the drivability, sound and overall experience... never as a HP number competition.

The only way to really gain 100 HP or more, is to supercharge it or Turbo... I didn't want to go that route.