01-24-2017, 09:46 PM
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#321
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Registered User
Join Date: Apr 2016
Location: va
Posts: 92
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I finally did this mod on my 01. It gives a nice rumble, but not really significant.... now, I want it louder..
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01 Boxster S 6Spd, Speed Yellow w/84k miles. | 991.1 911 C2 7spd Manual | 01 996 C2 -6spd - Green Machine - My baby | 997.2 C2S 6spd | 2x 01 Boxster base
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01-24-2017, 10:10 PM
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#322
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Registered User
Join Date: Sep 2013
Location: Montreal, QC. (currently expat to Shanghai)
Posts: 3,249
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Quote:
Originally Posted by professorman
I finally did this mod on my 01. It gives a nice rumble, but not really significant.... now, I want it louder..
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If I were you I'd just call Cecilia, The Deep-Hole Drilling Expert 
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'97 Boxster base model 2.5L, Guards Red/Tan leather, with a new but old Alpine am/fm radio.
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02-19-2017, 07:36 PM
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#323
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Registered User
Join Date: Feb 2017
Location: Norman Ok
Posts: 1
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Hey, new to this forum. Nice place. 2002 Boxter S, 85k m. Did the Crios mod a little differently. Easily repairable if you don't like it, but it did the job. Took the 15mm hole as a guide, but rather made a long, thin rectangle that followed the tube around about 25mm by around 2mm wide (same basic opening area). A slit rather than a hole, right where the bend is starting. I was thinking less bottleneck...., maybe. It's coming out the path of least resistance a little better from the first hit. Like in the gentlemans video, you can hear the engine breathing better and free'er and free'er-gas off. I drive the car for sure, but i'm not a rever, I'm a let her warm up a bit guy.. It's beefier in idle and the above now, just a little bit, fatter. I hear the roadster sound a little, would like more, but, eh. The car runs on rails, man. I love the experience. The whole thing came about because i couldn't hear the motor at stoplights and bottomed out a few into 1st. Shi=*t. Thanks for all the posts here. I knew I had to do this and it helped after driving around new to me for around 3 weeks to get here. You can bend the inner pipe up with a standard but strong screw driver if you like for more. I did just a little. No droaning sound. Motor does run a little more fluidly, bein' a seat of the pants guy and sniffer/listener. P.S. IMS, rotors good......etc. Great forum. 
Last edited by namooz; 02-19-2017 at 10:17 PM.
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05-10-2019, 01:55 PM
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#324
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Registered User
Join Date: May 2019
Posts: 77
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Sorry for the thread necromancy.
Particlewave - have you got a guide as to what you did? I've tried to look at the things you wrote a few posts back but i'm unclear whether that was the final thing you did or whether the welding work you did patched up that description of the holes you made?
Does what you did involve removing muffler and taking it apart or is it something you can do as the car sits/on ramps?
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05-16-2019, 02:50 PM
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#325
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Registered User
Join Date: Mar 2014
Location: So Cal
Posts: 299
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Quote:
Originally Posted by Nine8Six
If I were you I'd just call Cecilia, The Deep-Hole Drilling Expert
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Got her number? She can drill all my pipes! 
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05-16-2019, 03:54 PM
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#326
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Who's askin'?
Join Date: Mar 2018
Location: Utah
Posts: 2,448
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Quote:
Originally Posted by mgfranz
Got her number? She can drill all my pipes! |
Dood, that's my sister.....
Sent from my SM-G970U using Tapatalk
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05-16-2019, 03:56 PM
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#327
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Registered User
Join Date: Mar 2014
Location: So Cal
Posts: 299
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Quote:
Originally Posted by maytag
Dood, that's my sister.....
Sent from my SM-G970U using Tapatalk
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I'll have here home before the sun comes up... Walking funny.
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05-17-2019, 03:55 PM
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#328
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Registered User
Join Date: Sep 2013
Location: California
Posts: 466
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Quote:
Originally Posted by Nine8Six
If I were you I'd just call Cecilia, The Deep-Hole Drilling Expert
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She's a mid-western 10 and a California 6 
__________________
"Blind acceptance is a sign, of stupid fools who stand in line."
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05-17-2019, 04:05 PM
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#329
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Registered User
Join Date: Mar 2014
Location: So Cal
Posts: 299
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Quote:
Originally Posted by Slate 01
She's a mid-western 10 and a California 6 |
If your under 40, yes, a Cali 6. When you hit 50, everything is a 10 regardless of location!
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05-22-2019, 02:29 AM
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#330
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Registered User
Join Date: May 2019
Posts: 77
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considering doing this, but its not clear from the diagram/instructions. is it just a hole in the back of the exit pipe or does the hole need to be in the pipe behind that also? the diagram seems to look like it should go through 2 pipes essentially (each side) but no mention that i can see about that being the case.
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05-22-2019, 04:52 AM
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#331
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Registered User
Join Date: May 2019
Posts: 77
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ugh, just tried to take the tip off of mine and the bolt holding it on sheered off. got it off , now got to work out how to put a new bolt on when i dont have one welded to the tip any more
Last edited by thefunkygibbon; 05-22-2019 at 05:46 AM.
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05-22-2019, 10:20 AM
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#332
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,164
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Quote:
Originally Posted by Slate 01
She's a mid-western 10 and a California 6 |
What a coincidence! Your "California 10's" (fake face, lips, breasts, butt and caked on make-up) are midwestern 4's!
We like actual real women.
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05-22-2019, 10:22 AM
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#333
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,164
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Quote:
Originally Posted by thefunkygibbon
Sorry for the thread necromancy.
Particlewave - have you got a guide as to what you did? I've tried to look at the things you wrote a few posts back but i'm unclear whether that was the final thing you did or whether the welding work you did patched up that description of the holes you made?
Does what you did involve removing muffler and taking it apart or is it something you can do as the car sits/on ramps?
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You're looking at the wrong thread. See here: Internal exhaust mod
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08-27-2019, 09:58 AM
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#334
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ThreeSheds
Join Date: Aug 2019
Location: Royal Deeside, near Aberdeen, Scotland
Posts: 4
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Another Crios convert...
2004 Boxster S
I have read every Crios post there is on this and other forums (fora?) and have not seen one negative comment, so I decided to risk it...
First I tried drilling, but the jumping bit was way too uncontrolled for me, however it did put a few scars in the pipe wall that helped with the next thing I tried which was poking it up the bum with a sharp stick... Well not exactly, it was a sharpened piece of bar that I found lying about. It's about 14mm across and square section and I made an asymmetric point to give it best chance of digging in...
Anyway - it was remarkably easy - I didn't even have to hit it that hard - and now I have a nice square bypass hole in each of the outlet pipes.
If you are thinking of doing this - go ahead! It's amazing.
The car used to sound (to my ears) very tame - like a normal saloon (until the induction howl sets in), but now it sounds (again, to my ears) absolutely fabulous. It sounds like a sports car should but is not too loud. It's the Goldilocks of exhaust notes. And it didn't cost me a penny... To get the same effect on my motorcycle I had to spend £260, an now that's a bit too loud 
Crios - thank you, thank you, thank you...
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09-19-2019, 07:58 AM
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#335
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2002 2.7 Boxster in green
Join Date: Sep 2019
Location: Somerset UK
Posts: 102
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Hi, my exhaust tip is one single big oval, can the mod be done to this one aswell?
Cheers
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09-19-2019, 10:41 AM
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#336
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98 Arctic silver 986
Join Date: Jul 2011
Location: Upstate, NY
Posts: 1,452
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Yes if you look inside the tip you will see it has 2 sides.
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09-19-2019, 11:45 AM
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#337
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,164
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The internal bypass sounds much better :
Internal exhaust mod
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09-19-2019, 12:15 PM
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#338
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2002 2.7 Boxster in green
Join Date: Sep 2019
Location: Somerset UK
Posts: 102
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Quote:
Originally Posted by tommy583
Yes if you look inside the tip you will see it has 2 sides.
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Ok yeah, so am I drilling on the two closes sides of the two pipes or the two sides furthest apart? or doesn't it matter?
Cheers
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09-19-2019, 08:51 PM
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#339
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Custom User Title Here
Join Date: Mar 2012
Location: Ft. Leonard Wood
Posts: 6,164
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Quote:
Originally Posted by M9G
Ok yeah, so am I drilling on the two closes sides of the two pipes or the two sides furthest apart? or doesn't it matter?
Cheers
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Go back and read pages 8, 9, 10 and 11 of this thread. All of your questions are answered in the pictures.
Here: DIY Exhaust Mod – Gain of 10+ HP!!!
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09-20-2019, 07:17 AM
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#340
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2002 2.7 Boxster in green
Join Date: Sep 2019
Location: Somerset UK
Posts: 102
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Quote:
Originally Posted by particlewave
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I did read through it yesterday but got a little confused as so many pictures of different ways and people questioning the flow of the gases.
Cheers :-)
Last edited by M9G; 09-20-2019 at 07:44 AM.
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