Extensive Exhaust Upgrade
 

Ok so now I have my 2.5 80 series flowmaster now I'm opening up the rest of the exhaust. I want to do the front manifold with a log ceramic coating, ceramic coated cross over, and a down pipe to high flow cat. questions are as follows.
1. will the high temp and velocity from the front hurt the rear manifold or heads
2. A high flow cat will that screw with my srs light
3. What order should I do this so I don't put unneeded stress on new or old parts.

I know I'm asking alot if you want to type it that's awesome or can talk on the phone I'm always up for learning. I'm also assuming some tuning will be involved. Is it bad for my car to run with the new stuff while not tuning it?

Thank you all for your help wouldn't know where to start with out you guys.

By opening the exhaust, you are eliminating back pressure and subsequently helping the motor to be more efficient and to work less harder.

I know some hi-flo cat's trip the SES lights on 2000+ vehicles, but I'm not sure if its a legitimate problem for your year.

As far as the order that you mod your vehicle, you will get several different suggestions from different people. But, allowing the engine to inhale and exhale better is usually the first and best step.

Ceramic coating exhaust parts will not create more heat. The coating will help the parts retain heat longer, and resist rust.

I run the high flow cat form ZZ performance, no problems here.

what high flow cat will not trip the ses light on 2000+? been looking but not sure

Purplehazier is the one to ask about that.

So I was on ZZP looking at the down pipes. They have the their normal ones and ones for bonnevilles. I mean might sound dumb but do I need to spend the extra for the bonneville one or can I get the normal one?

The one for the Bonnie is bent specifically for the Bonneville. Spend the money...it will eliminate hassles during the install.

That would be the Goerlich 608227 Hi-Flow Cat.

ok cool just seeing if there was a significant difference

I ran a Magnaflow universal HF cat w/o issues on my 97. 2000 is when the system was ratcheted down for emissions.

ok so high flow cat is ok. now I'm thinking of running a 2.5" system could I get a 3" cat or would that cause a crazy turbulence in the system and stay with the 2.5" set up. Also with me changing my front header and cross over will the bolt into the stock rear header?

At your mod level, it won't necessarily hurt, only position you for future mods.

Plog and cross over should boltup if you stick with a stocker and coat it. shouldn't hurt anything. Although you should skew your front injectors by 2% IIRC.

that where you can come in my friend :bkissbutt: can you help my tune my car once this all gets done

Another thing now. ( I should write all my ideas down) I see the down pipe for the bonneville is either off road or they weld on the cat. Will a 3" down pipe hook up to my stock rear header? or will I have to get the 2.5" off road and cut out where the cat goes, OR, will ZZP make a 2.5 down pipe with a 3" cat for me you think? I dont want to loose too much back pressure and torque I really want to use a 2.5 downpipe or will a 3" be the best. I am N/A btw