So my "perhaps the cat is angled a bit instead of being parallel to the ground" was correct? Cool!

Keith

 

In my case, I dont think the cat is rattling. I know the heat shield and the cat are hitting because I have the cat parallel with the ground. The heat shield is less then 1/4" away from the cat. I might try to angle it a bit and see if this fixes it. When I installed the cat it just didnt make sense to angle the cat because I didnt want it to catch on to anything, especially at highway speeds.

 

heatshield was the reason we had to angle it...so maybe angling it will work for you (GREDDY).

 

Hopefully it does, it'll make me feel like I did a good job.

 

Rattling is not normal nor is it exceptable! I am sure that it is an alignment problem and you will have to turn the cat a little bit. The high flow cat we supply is very large, it has to be or it won't flow more than stock. The body is also shaped different than the stock "round" style cat. Please just turn it one direction or another and give it a little more clearance. I want you to be completely happy.

Also, the .400 thick stainless steel bushing we send is more than enough to get the clearance you need for a full 3" downpipe and those under braces. Did you take that factory donut washer off of the 02 housing? If not that will be the problem. Alot of guys don't remove it, it has to be taken out. The machined lip on the bottom of the 02 housing then fits inside the laser cut stainless flange on our downpipe and it is sealed like that.

Good luck, glad to hear you are happy.

David Buschur
www.buschurracing.com

 

I did have to tweak my buschur system a little to get everything to line up right after a bad install (don't ask). Like David has said before, make sure the round metal hanger is behind the rubber bushing, or you'll be banging all over the place. Also, I like to have the tip coming out from the bumper at least 1/2 inch just in case fuel enrichment turns my car into a flamethrower. :-D

 

Buschur, you are telling your customers to remove the factory dounut washer and not including a flex section either? That is cracking just waiting to happen on a SS downpipe.

The downpipe will have no flex at all after you remove that. Then over the years the downpipes will start to crack.

 

We angled the cat almost to a 45 degree angle to keep it away from the factory heat shield on the car. I'll take it by the local Midas where my buddy works and see if he can dicker with it a bit to make the rattling stop.

We did remove the donut, and still needed washers in addition to the spacer provided to give enough space for the DP not to hit the front bracer. ? dunno...maybe my car was just a fluke.

BTW, to get an idea of how well we have everything lined up, would you say the O2 sensor on the straight catback section is parallel with the road or slightly angled towards the road?

 

I can say this...the exhuast "hum" (I guess it's vibration from the engine) permeates the car's cabin a lot more than before...could this be the reason?

 

Personally, I think BeenWaitin4Evo needs to realign it. What you're getting is vibration, not exhaust tone. Drive it around for a week and drive it hard and you'll see where it's hitting. The last round hanger on the catback portion needs to be behind the rubber bushing that attaches to the subframe. Then install the muffler how you want it (I like it a little bit sticking out from the bumper for paint reasons) and realign everything else around that. You should be okay, there should be at least 1/2 inch of clearance around the whole system, including clamps.

 

The exhaust is not hitting anywhere on the car. The downpipe was before we spaced the front "crossbar" and now that has been solved. The vibration is somewhat of a floor vibration in the car, the exhaust just feels more connected to the engine now. I'm pretty sure all of the clamps have their bolt sides towards the driver side of the car and all had plenty of clearance, also.

The round hanger IS behind (towards the back of the car) the 2nd to last rubber hanger (the last being the one near the rear bumper for the muffler). I noticed how if the round hanger was in front, it would make contact with the subframe. David Buschur also posted about making sure I did this when I installed it. (I even came back inside to double-check his post ).

We also, after going out for a test ride, went back under the car to retighten everything to make sure it was tight after the exhaust got hot.

Hopefully my friend at Midas is working tomorrow. I'll take it up there and get it on a lift and see what's up.

 

Just got back from Midas and from downing a quality lunch product from the local Wendy's.

Problem solved. It appears that during shipping the heat shield on the catalytic converter got "bumped" and was rattling against the converter itself at high RPMs.

Ten mintues and an awl fixed the problem Cost me 10 bux, but worth it! (I bought my buddy lunch ).

100% satisfaction is now mine!

 

right on, so hows she feeling now

 

Nice strong pull to redline, matter of fact, today was the first time I've hit redline since I've owned the car.

Very happy Nice sound, nice power, nice quality. What more could you ask for?

 

Hey Matt I am glad you got the problem fixed. I do apologize for the inconvenince of having to have this done. If I can help in anyway in the future or when you need something else give me a holler. Thanks!