Long Tube Header Problems

[jfletch]

Hi everyone. Having some problems with my header and exhaust install. I ordered some pacesetter long tube headers, x pipe, high flow cats, and two magnaflow mufflers. Guy at the exhaust shop is saying that its not possible to run true duals with the 2 door tahoes. Is this true? Hes saying it gets too close to a plastic fuel line to run dual pipes after the header and it has to go down to a single pipe at some point. Can somebody please show me pics of their exhaust setup if you've made it work? Or am I really stuck with a Y pipe to fake dual exhaust set up?

For additional info its a 99 2 door tahoe 4x4

I spent a lot of time doing research for this and its become quite expensive and now it seems like its not even going to work, please help!

 

[upper_tanker]

He's wrong. If he says can't run true duals on your Tahoe, I'd probably take it somewhere else. My dad managed/worked at muffler shops for 20-25 years. Now, he owns a lawn company, and does exhaust work on the side (he has a bender). I watched him do mine, the same exact truck as yours, only 97. I have OBX stainless longtube headers. The only issue that I found was that my headers sort of point towards the outside of the vehicle. What I went and did, just for extra piece of mind, was got the heat shield wrap stuff and a few of the steel zip tie things. I wrapped the section of brake and fuel lines that were closest to the header. They were still 5"+ inches away, but I wanted the extra safety.

My dad ran my pipes up between the gas tank and spring shackles. It was a VERY tight fit, with dual 2.5" pipes. We did have to go and adjust (bend, dent a little) the pipes in some spots due to how tight it was. If I were you, I'd stick with 2"-2.25" pipes. Easier on the exhaust guy, and probably cheaper for you. 2-2.25" true duals is plenty of flow, even for a mild engine. I wish I'd have went with 2.25".

 

[jfletch]

He's wrong. If he says can't run true duals on your Tahoe, I'd probably take it somewhere else. My dad managed/worked at muffler shops for 20-25 years. Now, he owns a lawn company, and does exhaust work on the side (he has a bender). I watched him do mine, the same exact truck as yours, only 97. I have OBX stainless longtube headers. The only issue that I found was that my headers sort of point towards the outside of the vehicle. What I went and did, just for extra piece of mind, was got the heat shield wrap stuff and a few of the steel zip tie things. I wrapped the section of brake and fuel lines that were closest to the header. They were still 5"+ inches away, but I wanted the extra safety.

My dad ran my pipes up between the gas tank and spring shackles. It was a VERY tight fit, with dual 2.5" pipes. We did have to go and adjust (bend, dent a little) the pipes in some spots due to how tight it was. If I were you, I'd stick with 2"-2.25" pipes. Easier on the exhaust guy, and probably cheaper for you. 2-2.25" true duals is plenty of flow, even for a mild engine. I wish I'd have went with 2.25".

Thanks so much for the fast reply man I appreciate it! Is there anyway you could snag a pick of the set up for me if you have a chance?

 

[castine917]

Avoiding melting a plastic fuel line sounds smart. Can't is just a cop out. Find another shop. Follow upwith other shop on how they avoid line. Some insulating wrap should do the trick.

 

[upper_tanker]

I will try to snag some pics. May be a while, it's in storage. IIRC, the headers were closest to steel lines (brake/fuel). I could be wrong, but I don't remember mine being close to any plastic lines. What's the part number of your headers?

 

[castine917]

I don't remember any plastic lines either but I have tbi and it is/could be different material and routing than the 99 setup. Even if lines are rubber or steel or anything else they should not be allowed to get excessively hot.

 

[jfletch]

Got everything fixed up now guys thanks for the advice! Going to be making a few videos to show everybody.
Here's one with open headers on the way to get my exhaust finished!

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[Chevyman71892]

I'm looking to get a set of those.. where can I find a y pipe or crossover pipe so I can run a single 3"? Or do I have to make my own?

 

[jfletch]

I'm looking to get a set of those.. where can I find a y pipe or crossover pipe so I can run a single 3"? Or do I have to make my own?

Amazon, ebay, and most websites like summit will have the y pipe piece. It'll probably be a lot cheaper to have someone do the rest of the exhaust custom though, just buy your y pipe, cats, and a muffler.

 

[PlayingWithTBI]

If you want to make your own with long tube headers...
https://www.summitracing.com/search?SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=FLO-Y250300

For shorty headers this has much better flow than stock but a little spendy...
https://www.summitracing.com/search?SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=JBA-2831