# WTF does my car have VTEC?

**URL:** <https://forums.speedlife.net/t/wtf-does-my-car-have-vtec/122257>\
**Category:** SON240sx Automotive\
**Created:** [March 3, 2009, 9:45am UTC](https://forums.speedlife.net/t/wtf-does-my-car-have-vtec/122257 "2009-03-03T09:45:31Z")\
**Posts on this page:** 1\
**Showing post:** 42

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**Author:** ![DA\_1](https://avatars.discourse-cdn.com/v4/letter/d/ba8739/32.png) [@DA\_1](https://forums.speedlife.net/u/DA_1)\
**Post date:** [March 5, 2009, 7:34pm UTC](https://forums.speedlife.net/t/wtf-does-my-car-have-vtec/122257/42 "2009-03-05T19:34:58Z")

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> [@Dec. 2nd 10pm - Redman, Raekwon, Ghostface, DJ Kool, Smif N Wesson and more](https://forums.speedlife.net/t/dec-2nd-10pm-redman-raekwon-ghostface-dj-kool-smif-n-wesson-and-more/20606/3):
>
> Thanks for the response guys! I’ll be PM’ing you in the future when I have some more questions regarding my build!
> 
> R33, I believe a 3" exhaust does lose power… I’ve got a 3" Bee\*R on my SOHC KA. Only mods other than that are intake pipe and HKS filter. The moment I removed the silencer from my exhaust, I really noticed a loss of low-end torque. The mid-range climb to top-end improved by quite a bit, but it wasn’t too much of a drastic improvement to justify baiting your car with a loud exhaust with only minimalistic gains.
> 
> If I could do it all over again, I’d be running a 2.5" high-flow cat and cat-back… As for 2.5" cat-backs, no clue on what to run with, though…
> 
> Whats the stock KA downpipe-to-cat diameter?

very well said thats exactly the result u loose lowend torque but gain minimal up top…2.5 inch exhaust have proven to be fine up to 400+ whp

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