Top Speed Bypass pipes initial impression

[shadrach74]

My bypass pipes arrived this week for $189 shipped. I will drop them by my shop while they do the RMS, IMSB and other work this week. I plan on doing a dyno test in the future to see if there is any difference at all... My primary reason to install these is weight savings as well as removing a major heat source (secondary cat) from the vicinity of my CV boots.

This kit includes the pipes, gaskets, clamps, and other hardware needed for installation.




The quality of the materials is as good or better than I would expect for this price point. There are some marks from the manufacturing process as well as some minor pitting here and there, but for the money, I think the materials are satisfactory.






The quality of the welds appears to be adequate. While the finish could be a bit better, we are talking about less than $200 here, I am pretty happy with it.






The proof will be in how easily it bolts up to my 3.2. I will report back as things progress!

Cheers!

Ross

[Kenny Boxster]

I bought a pair too. Let's see how this goes.

[ohhh my]

I would also be interested to hear your impression and install process. I just sent Che an email and will report back how they handle everything.

I have a 03 Boxster S and here is my problem.

After I received my order on Friday, I took the box straight to an exhaust shop to get it installed.

The first exhaust shop said the angle and shape of the piping was incorrect, but I wanted a second opinion because it was a small mom and pop shop and based upon reading the forums, I knew there would be some slight modification that needed to be done.

So today, Saturday, I took it to another shop to get their opinion. Again, they said there is no way these pipes will fit. There is 2 problems with these pipes. The angle of the pipe is incorrect and also the shape of the pipe is also wrong. If you look at the stock setup on a 2003 Boxster S, the pipe from the primary cat to the exhaust should angle upwards towards the trunk, top speed's pipes are nearly flat with only a very slight angle at the flange.

The second problem is the shape is also wrong. See attached pictures. When it's lined up with the factory flange, the end of the pipe is pointing towards the end of the bumper.

[delubozparts]

For anyone received These Test Pipes in same side, Please contact us immediately we will provide exchange plus provide UPS Return shipping Label. My apologies for the Inconvenience

[ohhh my]

more pictures...

[sb01box]

Originally Posted by ohhh my

more pictures...

Hi ohhh my,

The photo of the secondary and the muffler does not looks to be an '03 OEM flavor (that I am aware of). As a minimum, shouldn't there be a U-tube that connects the secondary cat pipe to the muffler and is held by a double pipe clamp?
the photo of the flanges (header and the pipe) definitely shows different wear. the exhaust header and it's flange is lot more "aged"

added new info.
I'm in the process of installing the topspeed pipe. Sprayed penetrating oil and while waiting for the chemical to do it's job, tooks this photo and made some measurements.
the photo is of the secondary CAT on the left side. You can see the left rear tire and the last plastic screw holding the bumper skin as well as the U-tube.
the center of the dual clamp (this should be the end of the secondary pipe) is (on my car 01 2.7L) one inch towards the front of the car with respect to the screw and about 2.5 inches in toward the center of the car from the same screw.
also measured from the aluminum heat shield to the center of the secondary cat body and this was about 2.5 inches as well. on my car, the OEM pipe does bend significantly towards the tire and the fender.

I'm not trying to contradict or start an open argument. Hopefully, this forum is here to exchange information and doing so will be to member's overall benefit. I have gained lots of knowledge from the Forum/Members
Regards,
Tad

[sgt brad]

supposedly correct pipes are on their way. i will let everyone know how it goes. it may still be a while before install though.

[shadrach74]

My confidence is fading. While the pipes are reasonably constructed, it means little if there not properly designed. I was concerned from the outset given the feedback of other buyers. While I don't know the exhaust system well enough to say whether mine will fit just from looking looking at the pipes, but I will say that the angles look quite sharp compared to my mental picture of the rear pipes. Stay tuned...

[Steve Tinker]

I fitted a set of test pipes to my 2001 S Boxster last January with no problems at all. After saying that, I had fitted Che's headers a few weeks before, again with only minor adjustments to the fixing holes (they were slightly too small). I cannot comment re fitting the pipes to the standard headers.
However, when fitting the pipes, I started off loosly bolting the flange on to the header section, but no way could I get the other end of the pipe lined up with the muffler. The secret is to push the test pipe into the muffler and THEN adjust & connect up the 3 bolt flange end, pulling up the gap slowly & evenly with the bolts.
Of course, there could still be a problem with your particular pipes (or the wrong ones ordered / sent), but I must say I am very happy with my purchase from Che.....

[sgt brad]

Houston, we have a problem. I have two identical pipes as well. No way these will work. Going to post in the for sale thread.

[shadrach74]

Originally Posted by sgt brad

Houston, we have a problem. I have two identical pipes as well. No way these will work. Going to post in the for sale thread.

My pipes are not identical. They appear similar, but they are certainly different. This is not to say they will fit, but I'm going to reserve judgment until we attempt to match them up to the car. Why would you try sell them as opposed to sending them back? At that point you're just kicking the can down the road to someone else. If mine don't fit, Che will be the first to know and his handling of the situation will be detailed here. Similarly, if they do fit, I will also detail the particulars here.

[sgt brad]

Originally Posted by shadrach74

My pipes are not identical. They appear similar, but they are certainly different. This is not to say they will fit, but I'm going to reserve judgment until we attempt to match them up to the car. Why would you try sell them as opposed to sending them back? At that point you're just kicking the can down the road to someone else. If mine don't fit, Che will be the first to know and his handling of the situation will be detailed here. Similarly, if the do fit, I will also detail the particulars here.

I meant that I would be posting in the for sale thread for che to see. Unfortunately my laptop is down right now so I cant download pics.

[sb01box]

Originally Posted by shadrach74

My pipes are not identical. They appear similar, but they are certainly different. This is not to say they will fit, but I'm going to reserve judgment until we attempt to match them up to the car. Why would you try sell them as opposed to sending them back? At that point you're just kicking the can down the road to someone else. If mine don't fit, Che will be the first to know and his handling of the situation will be detailed here. Similarly, if they do fit, I will also detail the particulars here.

Shadrach74,
looking at your very first photo, it looks like you have two left sides. I arranged the pipes just like it is in your photo and I can only get this. see how the top pipe's flange is resting on the side, but the other pipe is resting on a tip of the flange.


when I arrange my set with the tubes flat and with the end pointing away from each other, a side of the triangular manifold flange is almost flat to the surface. I believe once installed, a flat feature of the flange is the bottom most part of the connection.



I've been doing some additional look-see. (measured, but very subjective.)
1) since the pipes are "symmetrical about the engine, you can check for symmetry.
2) resting the bottom side of the flange on the table, and with carpenter's level on the surface of the flange, proping up the pipe end till the flange was vertical, the bottom of the pipe end was 3-3/4 and 4.0 inches above the bench
3) with the pipe resting in what will be it's installed orientation, see photo above, the measurement from the top tip of the flange to the top the middle of the pipe end was 20 inches for both.

I need to stop playing with them and start the installation

[Jittsl]

Be careful. If you start to install them they become used (acording to honest John). Used product does not get full refund.

[sb01box]

Originally Posted by Steve Tinker

I fitted a set of test pipes to my 2001 S Boxster last January with no problems at all. After saying that, I had fitted Che's headers a few weeks before, again with only minor adjustments to the fixing holes (they were slightly too small). I cannot comment re fitting the pipes to the standard headers.
However, when fitting the pipes, I started off loosly bolting the flange on to the header section, but no way could I get the other end of the pipe lined up with the muffler. The secret is to push the test pipe into the muffler and THEN adjust & connect up the 3 bolt flange end, pulling up the gap slowly & evenly with the bolts.
Of course, there could still be a problem with your particular pipes (or the wrong ones ordered / sent), but I must say I am very happy with my purchase from Che.....

I just received a set and am planning to install it this weekend. purpose is to see if the rattle is from the secondary cat (hoping it's not the primary cat).
a question on installation. It is my understanding that the engine/transmission is one piece when assembled. and that the header, mid pipe and the muffler bolts to the engine head and to the back plate of the transmission. as such, there is no need for bellows-like pipe section to absorb the differential movement that is present in autos with the muffler hanging from the chassis.
with this design, the test pipe bends should be such that the pipe just drops in and working the three screws/bolts at the flange will only induce stress into the exhaust system and worse to the head. this I believe is not good- and should not have to be done.
Is the assumption that when the pipe gets hot, it will auto-align and adapt and such the stress during assembly will be "eliminated" and all is fine from there on?

[shadrach74]

Steve,

I have 2 sets of TS test pipes at home waiting to be installed. The second set is slightly different from the first. I hope to install this weekend. I am hoping that I can make some combination of what I have work properly. I will post pics this weekend and send the unused pipes back to Che.

[Homeboy981]

Originally Posted by shadrach74

I have 2 sets of TS test pipes at home waiting to be installed. The second set is slightly different from the first. I hope to install this weekend. I am hoping that I can make some combination of what I have work properly. I will post pics this weekend and send the unused pipes back to Che.

Hi Shad,

Make sure the ones you put in look like this when you lay them out BEFORE installation. (they are laid out backwards in the photo FYI)

You should be able to do this with ONE SIDE to ensure you have the correct bends…


See how the FLANGE IS DIFFERENT? That IS PROOF POSITIVE you have the CORRECT PAIRS.

Good luck with the install. The best way to not have a problem with fitment is to mount loosely and then, once everything is "in the air" torque it down good and tight. Drive it long enough to warm up and then re-check tightness.

There will be some added sound and low end torque increase but your car will definutely 'breathe easier'. So will you!

Enjoy!

[shadrach74]

Hey Homie,

I definitely have 2 sets of left and right pipes. The Flanges are oriented correctly, but the bends vary somewhat from pipe to pipe...

Originally Posted by Homeboy981

Hi Shad,

Make sure the ones you put in look like this when you lay them out BEFORE installation. (they are laid out backwards in the photo FYI)

You should be able to do this with ONE SIDE to ensure you have the correct bends…


See how the FLANGE IS DIFFERENT? That IS PROOF POSITIVE you have the CORRECT PAIRS.

Good luck with the install. The best way to not have a problem with fitment is to mount loosely and then, once everything is "in the air" torque it down good and tight. Drive it long enough to warm up and then re-check tightness.

There will be some added sound and low end torque increase but your car will definutely 'breathe easier'. So will you!

Enjoy!

[Steve Tinker]

shadrach...
You are correct, the two pipes are different lengths - as are the Porsche originals when you remove tham and look at them side by side.....

sb01box...
When I fitted the test pipes, the gap between the 2 flanges was quite small say 5 - 10mm (1/4 - 1/2") which pulled up easily. I guess if I had pulled and pushed the pipes out of the muffler entry by hand, I could have possibly closed the gap - as it was I was tired and just used the 3 bolts to slowly pull the flanges together.
I rechecked the bolt / head stud tenioning last month after 3,000km and there ware no signs of leaks, cracking or metal fatigue that I could see.

[sb01box]

Originally Posted by Steve Tinker

shadrach...
You are correct, the two pipes are different lengths - as are the Porsche originals when you remove tham and look at them side by side.....

sb01box...
When I fitted the test pipes, the gap between the 2 flanges was quite small say 5 - 10mm (1/4 - 1/2") which pulled up easily. I guess if I had pulled and pushed the pipes out of the muffler entry by hand, I could have possibly closed the gap - as it was I was tired and just used the 3 bolts to slowly pull the flanges together.
I rechecked the bolt / head stud tenioning last month after 3,000km and there ware no signs of leaks, cracking or metal fatigue that I could see.

Steve Tinker,
my concern, after reading this and "other" thread is that the angles were off. in your case it sounds like the pipes were little short, but the header flange and the pipe flange were parallel and needed to be brought together.
the "suspension" that the muffler attaches to should allow for forward movement of the muffler to accommodate 5 to 10mm gas.
were the gap the same on both sides?
thanks in advance