Although my mechanics know that we can use Thorleys with a little mod, they recommend Hookers. They are twice as much, but are better quality and no mods needed. They also suggest Flowmaster pipes/muffler. All told, about $1200. Good, or should I drive 1 hour to Camping World and do the Gibsons?
As long as they are heavy wall tube I don't think there is a lot of difference. Headers are designed for an rpm range, are the Hookers lower rpm longer tubes?
The biggest thing I would expect for $1200 is stainless steel headers, pipe, and mufflers. That is real steep for plain steel.
I pretty much told them that I want Thorleys installed, the model 303Y, and they said Ok, but that I would have to get the Flowmaster stuff with them at the same time. I don't know what the material is, but they said it would be 600+ dollars installed (Flows included) plus what it costs me for the headers on my own. So that's about 900-1000 bucks. The 1200 was with Hookers.
I like Thorleys. Why do they need modification? They're on many, many Airstreams, including mine. Putting any headers on is nasty work. The Flowmaster series 70 muffler is $100. The Thorleys are @$300. Pipe is pipe. I know Norcal mechanics like money, but I can't see more than 4-5 hours, even if you have a broken bolt or 2. Shop around.
I have had car with headers before and have had the hookers as well. When it comes to needing performance they are great. Headers do have drawbacks though. Unless properly installed they are prone to leaking and sometime will still leak or burn out early. If I was looking for reliability and longetivy I wouldn't consider headers but go back with stock cast manifolds. Thats just my experience in the past. They may be making headers with better materials now that im not aware of.
This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.