Top Speed Bypass pipes initial impression

[2000boxster986]

Received a left and right pipes from Top-Speed with no issues. Overall quality appears to be good. However like others mine did not fit as well as I was hoping. I had to do some mods. Some of the proper fitment was hampered by the exhaust modes already done to the car before I bought it. I think it's called a Pedro exhaust mod etc... The Pedro mod has the 1" pipes welded to the U tubes and not the muffler inlet. So, they were unmovable, otherwise I might have been able to tilt the U tubes down for a better fit with the hardware received in the pipe kit.
I wound up using 1 3/4" ID x 2" OD reducers and 2" stainless flexible muffler pipe to get everything to work and to assure nothing was overstressed. I don't particularly like muffler clamps and bendable pipe for exhaust mods but check out the pics below. It's a solid fit and there are no leaks. I'm running stock manifolds with pre-cats.
I don't have the car off the rack as yet but did start it up and it sounds good.

[ProjectM96]

Originally Posted by 2000boxster986

Received a left and right pipes from Top-Speed with no issues. Overall quality appears to be good. However like others mine did not fit as well as I was hoping. I had to do some mods. Some of the proper fitment was hampered by the exhaust modes already done to the car before I bought it. I think it's called a Pedro exhaust mod etc... The Pedro mod has the 1" pipes welded to the U tubes and not the muffler inlet. So, they were unmovable, otherwise I might have been able to tilt the U tubes down for a better fit with the hardware received in the pipe kit.
I wound up using 1 3/4" ID x 2" OD reducers and 2" stainless flexible muffler pipe to get everything to work and to assure nothing was overstressed. I don't particularly like muffler clamps and bendable pipe for exhaust mods but check out the pics below. It's a solid fit and there are no leaks. I'm running stock manifolds with pre-cats.
I don't have the car off the rack as yet but did start it up and it sounds good.

I had the same problem with fitment on my stock muffler. The U-pipe did not connect with the TS pipes. I used all the strength I had to force it in place. I had to loosen the catback exhaust as well to move it back an inch. The problem I have now is an exhaust leak. The TS mid pipe end diameters were much smaller than the factory OEM U-pipe. Not even the clamps are enough to close the gap.

[2000boxster986]

Oops, I also had the small pipe diameter issue. Sorry, I had forgotten to mention that in the post. This was another reason the flex pipe seems to work well. Guess time will tell but it's pretty solid. I'm also thinking about adding a small bracket between the muffler and cross member just to assure the muffler doesn't move around on rougher than normal roads.

[dagdisco03]

I'm not sure I follow what you are talking about for a bracket.

Remember that the muffler is mounted to the gearbox and engine as one unit with the rubber damper on the top side of the muffler.

What I am saying is the muffler and gearbox move as one unit you don't want to place a bracket from the muffler to a ridged cross-member. You will break something and have a lot of vibration.

I do like the way the flex pipes came out I did more forcing on mine then I was happy about.

Burning smell went away after about 200 miles. At first you would think the car was going to catch fire it smelled so bad.

[2000boxster986]

Thanks Dagdisco03, I copy. Very good point. The bracket I'm thinking of making would have a rubber section in the middle that would absorb small impacts. I understand what you are saying. There is movement from the engine/trans so locking it ridged to the cross member isn't a good idea. Sorry I didn't really expand on it in the original post. Glad you're keeping me honest. Pic attached is a small rubber shock absorber. I have a couple of these I was considering using. But now that I think about it... It's prob overkill. Maybe I should just run with it and see how it does. If I hear thumping I'll consider a custom shock bracket then. Thanks

[Autocrosser#73]

Originally Posted by 2000boxster986

Received a left and right pipes from Top-Speed with no issues. Overall quality appears to be good. However like others mine did not fit as well as I was hoping. I had to do some mods. Some of the proper fitment was hampered by the exhaust modes already done to the car before I bought it. I think it's called a Pedro exhaust mod etc... The Pedro mod has the 1" pipes welded to the U tubes and not the muffler inlet. So, they were unmovable, otherwise I might have been able to tilt the U tubes down for a better fit with the hardware received in the pipe kit.
I wound up using 1 3/4" ID x 2" OD reducers and 2" stainless flexible muffler pipe to get everything to work and to assure nothing was overstressed. I don't particularly like muffler clamps and bendable pipe for exhaust mods but check out the pics below. It's a solid fit and there are no leaks. I'm running stock manifolds with pre-cats.
I don't have the car off the rack as yet but did start it up and it sounds good.

Very nice photos...thanks for sharing your installation process with us! Where did you buy those flex pipes? I may need a pair too for my upcoming installation.