If I purchase a new cross over pipe, will I gain anything hp, lower egt's. Lower EGT's I know I will gain. Is it worth it.

Installing a larger cross-over pipe may net you a couple of horsepower, but it is not very noticeable. A mandrel bent tube flows better, but my butt dyno couldn't tell any difference at all.

I'm putting header wrap on my crossover this weekend. That should help, but I doubt I will be able to tel the difference most of the time.

Jake

Was the original cross-over pipe double walled tubing? I tossed mine months before my project was completed & didn't look at it that closely.

I've read some posts about the x-over being restrictive that made it sound like it was double walled.

If it was double walled, wouldn't 'ya think the factory did that to lessen heat energy loss.

The cross-over was the only part of my exhaust I bought in stainless. I ceramic coated it, then also wrapped it in header wrap. I'd seen situations where the header wrap seemed to promote corrosion at a faster rate under the wrap - maybe retained water during rainy driving?

Was the original cross-over pipe double walled tubing?

Yes, the stock x over was double walled.
Ceramic coating is a good idea, if you have the money..........

The factory ones were double walled. No idea why, unless its just they figured it may rust easily and how important that pipe is to the turbo system. The inner walls can collapse when the pipe is bent. I cut my factory crossover apart at the bends and it wasn't that badly kinked. Some of them you can barely fit a pencil through the space that's left.

Did i notice any difference with the 2.5 mandrel bent over the stock one? No not really. My EGTs may be a bit lower, but i didn't have the EGT gauge with the old crossover pipe, so i can't say if this is true or not. No noticeable difference on the butt dyno either.

I've been debating the header wrap idea. Let me know how it works out for you.

Thanks

- Dave

I just bought a new x-over pipe from the local dealer, it was $130,single wall,bigger than the original and not all waffled at the bends. It fit perfect.

Ceramic coating doesn't have to be expensive if you can do the work yourself. The material itself is relatively cheap. The small bottle of Cermakrome to do my exh manifolds, turbine housing, cobra shaped exh elbow, & crossover pipe was <$25.

There's a fair bit of work in abrasive blasting the parts clean, then spraying the material on, curing in an oven, & then polishing w/ 0000 steel wool. There are some tricks to getting it applied evenly, not too thick. Feel free to inquire if you decide to do this.

Cermakrome comes from TechlineCoatings. Same vendor that supplies the different coatings they used on that 6.2 build detailed in MaxxTorque.

Wouldn't you expect the factory crossover was double-walled to limit/lessen heat energy loss? There are some examples of double-walled exh manifolds where their goal was to conserve heat so as to get the catalytic convertors up to temp quicker.

The cross-over was the only part of my exhaust I bought in stainless.

Where did you buy it from?

Many years ago I bought it directly from Techline - I'll PM you their website. Not certain if they still sell direct - the header/coating shops might not appreciated the material being available direct to consumers. Not all coating shops use this material - but a bunch do.

I believe the last bottle I bought from Eastwood. It took some looking to find somewhere to buy it direct.

Don't know that it's particularly hazardous. I believe it's Al powder that allows it to polish up nicely & provide good corrosion protection. Takes some enginuity (sp?) to get the solution thoroughly mixed & kept that way while you spray. It settles out rather quickly & then the spray gun can spit bits/chunks.

Moved to Fuel System, Air, Exhaust, & Emissions Upgrades...