JeremyGSU

Hey guys, there are many threads of having this mod completed but most are outdated by several years. Suppliers and welding shops change in periods like this so I thought I would supply all the info on what I had done recently.

2004 Z - exhaust bypass mod completed. My car has a Vararam and tune besides the bypass.

Before



After - unfortunately I did not take the weight afterwards



I started with purchasing a 2 ft x 2" piece of titanium piping along with 100 ft. of welding rod from http://www.titaniumjoe.com. The guy I talked to on the phone suggested the 2" piece over the 1.5" most guys use. I believe the pipe and rod shipped to me was around $125.

I live in Ocala, FL and called MANY welding shops in Orlando, Tampa, Ocala, and Gainesville before I found a few that said they could do it. I ended up using a place called Hahn Racecraft in Morriston, FL. They are out in the middle of nowhere.
http://www.turbosystem.com/New_Folder/Contact%20Us.htm

They charged me $270 to weld the piping. They quoted me $90 per hour and thought it would take 2 hours. However, he had to shrink the piping down to fit on one side due to the diameter so it took longer. Perhaps a 1.5" pipe would have been better. The guy did a great job on the actual welding. His only complaint was my welding rod I supplied as a little thin. They would have preferred a thicker rod. It was really thin.

I had the exhaust removed at Modern Muffler in Ocala for $30. He only charged me $20 to put it back on.

As for the sound, it is definitely noticeably louder than stock when WOT. Driving around town it doesn't seem that much louder just normal accelerating but WOT it's very noticeable that it's louder. Cruising it doesn't seem much louder if any, which is nice for when you want it quiet. Idling I thought it was about the same until I parked next to my student at the last track day who had a bone stock '02 Z. Mine sounded like it was twice as loud. I couldn't hardly hear his. I also like how it pops when you let off during deacceleration. I'm anxious to get some longtubes and no cats because then I think it will really open it up and have exactly the sound I am looking for.

So at the end of the day I spent:
$130 pipe
$270 weld
$50 remove/install.
Total - $450.

Not the cheapest mod but the next option is a heavier exhaust such as GHL Bullets at $850. So I retained the weight and got some more sound.

Hope this helps.

Jeremy

GeorgeZNJ

Thanks for posting, the welds look great.

96juicedgt

Looks great. Now get some exhaust vids.

JeremyGSU

I went to the track this weekend using the same setup I had before and the sound increase is definitely noticeable.

Before
http://www.youtube.com/watch?v=h-0wClKXcz4

After
http://www.youtube.com/watch?v=s78xBkugyj0

I love how it sounds when you're letting off now.

Car sounds much meaner IMO.

LS6RBST

Sounds sweet! Nice driving!

Masterofsod

Any downside or issues that can result from it? Emissions perhaps?

ZeeOSix

This mod doesn't affect emissions ... only sound, as the muffler is being bypassed by some of the exhaust.

Masterofsod

I read that somebody noticed a different smell?

MY03C5Z

I just had this mod done, no change in smell? How could bypassing 1/2 of the muffler effect the smell? Its a partial muffler bypass, not a cat bypass...

Masterofsod

I read that in another post, it did not make sense to me either. maybe that person did not have cats. I think I was looking at your post actually? Can you PM me the shop (Trenton I think) and how much they charged you? Thanks

MY03C5Z

Yes jeremy said in my other post that he was not running cats on his, thats why it would smell. I still have my stock cats. Sent you a pm.

kwik ws6

looks good, thanks for the info.

MrH00nel2

thanks for the info on this. I got mine done. 36.00 for the 12' pipe from titanium joe and 150 to have it welded.

this is the titanium i got. http://www.titaniumjoe.com/index.cfm...0:0.045:WELDED

OneCylinder

Great videos, looks like you were having a blast. Your bi-pass sounds super!

Rev_2_8k

+1 for this....

Jeremy, twin cars man, I got this done a few months back. I only needed to buy 1' from Titanium Joe... Not many guys can weld Titanium properly, but the mod was well worth it.

Mine burbles and backfires on deceleration... it's definitely louder stock idle and MUCH louder on throttle. I was in the same boat thinking that it didn't do much until I compared to stock, always nice to have a reference point

Steve

skeeters65

Can anyone tell me what diameter filler rod you used and how many feet of filler rod you needed??
Thanks

Supercharged111

That video is a great selling point. Not really all that loud, but a lot more definition (*****) to the sound. And now we wait for the filler rod question. . .

MrH00nel2

Size doesn't really matter as long as you have enough. It would be cheaper if you find a welder that can do it and he had his own filler rods versus buying it. Titanium is not hard people just think it is. Have to keep it clean and under 800 deg plus a few other things that you can goggle and test your welder.

Otherwise this should work. http://www.titaniumjoe.com/index.cfm...cks:TIG%20wire

JeremyGSU

I'm going to make another video here soon. I've added longtubes and removed the cats. It's a lot louder now.

cudamax

Great Driving Was Wondering why dont u just put some Electric cut outs in?