Jump to content

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Porsche 911 996 Muffler Bypass Exhaust

scott449
 Share

Recommended Posts

whs Member

whs

Posted
Posted

I'll go out on a limb here and say these would not be street legal in most states and probably would exceed the noise level requirements at most tracks. If you compare the difference between stock mufflers and performance mufflers, it's pretty significant. I can't imagine bypassing the mufflers all together!

Will

this item is listed on Ebay and i was wondering if any have had experence with them. do they really add 12HP?

http://cgi.ebay.com/ebaymotors/Parts-Acces...d=p4506.c0.m245

Link to comment
Share on other sites
yasuro Member

yasuro

Posted
Posted
this item is listed on Ebay and i was wondering if any have had experence with them. do they really add 12HP?

http://cgi.ebay.com/ebaymotors/Parts-Acces...d=p4506.c0.m245

my understanding is that an engine needs some backpressure. bypass removes just about all of it so you'll experience some loss of torque at low RPMs. as to whether or not they'll add 12 HP, the only way to know for sure is to dyno your car with them. try getting on a dyno check the HP and then get on the dyno again without mufflers. this will show you what changes, if any, you'd experience with bypass pipes.

Link to comment
Share on other sites
silver_6r Member

silver_6r

Posted
Posted (edited)
this item is listed on Ebay and i was wondering if any have had experence with them. do they really add 12HP?

http://cgi.ebay.com/ebaymotors/Parts-Acces...d=p4506.c0.m245

my understanding is that an engine needs some backpressure. bypass removes just about all of it so you'll experience some loss of torque at low RPMs. as to whether or not they'll add 12 HP, the only way to know for sure is to dyno your car with them. try getting on a dyno check the HP and then get on the dyno again without mufflers. this will show you what changes, if any, you'd experience with bypass pipes.

its has been proven that NOTHING ADDS ANY SIGNIFICANT power increase to NA engines other than a SC. i have had muffler by-pass pipes.. and other than sounding wonderful... do not add HP... and for street use are not good as they shift the torque curve way up... noticably.

make your own with 90' stainless elbows, weld straight sections to them... get a shop to flare out one side so that they slide over the exhaust.... add tips... or not.... WAY CHEAPER...same result

Edited by silver_6r
Link to comment
Share on other sites
scott449 Member

scott449

Posted
  • Author
Posted
this item is listed on Ebay and i was wondering if any have had experence with them. do they really add 12HP?

http://cgi.ebay.com/ebaymotors/Parts-Acces...d=p4506.c0.m245

my understanding is that an engine needs some backpressure. bypass removes just about all of it so you'll experience some loss of torque at low RPMs. as to whether or not they'll add 12 HP, the only way to know for sure is to dyno your car with them. try getting on a dyno check the HP and then get on the dyno again without mufflers. this will show you what changes, if any, you'd experience with bypass pipes.

its has been proven that NOTHING ADDS ANY SIGNIFICANT power increase to NA engines other than a SC. i have had muffler by-pass pipes.. and other than sounding wonderful... do not add HP... and for street use are not good as they shift the torque curve way up... noticably.

make your own with 90' stainless elbows, weld straight sections to them... get a shop to flare out one side so that they slide over the exhaust.... add tips... or not.... WAY CHEAPER...same result

cool thanks that is what i needed to know

Link to comment
Share on other sites
  • 2 weeks later...
Chris_C Member

Chris_C

Posted
Posted
this item is listed on Ebay and i was wondering if any have had experence with them. do they really add 12HP?

http://cgi.ebay.com/ebaymotors/Parts-Acces...d=p4506.c0.m245

my understanding is that an engine needs some backpressure. bypass removes just about all of it so you'll experience some loss of torque at low RPMs. as to whether or not they'll add 12 HP, the only way to know for sure is to dyno your car with them. try getting on a dyno check the HP and then get on the dyno again without mufflers. this will show you what changes, if any, you'd experience with bypass pipes.

its has been proven that NOTHING ADDS ANY SIGNIFICANT power increase to NA engines other than a SC. i have had muffler by-pass pipes.. and other than sounding wonderful... do not add HP... and for street use are not good as they shift the torque curve way up... noticably.

make your own with 90' stainless elbows, weld straight sections to them... get a shop to flare out one side so that they slide over the exhaust.... add tips... or not.... WAY CHEAPER...same result

cool thanks that is what i needed to know

I have done the bypass pipes as well, they are great fun!.... but if you put your foot into it you will be heard at least 1 mile away.... :lol:

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.