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If you want to listen to a CDI header with custom cat-back stop by the Happy Day's Diner, San Jose, CA., Aug. 15th Viper night.
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If you can't make the trip. But, would like to find out what a very knowledgeable Viper owner thinks about the way the CDI header's sound on his car... please click on the link below:
http://www.btrviper.com/cgi-bin/messageboard/index.cgi?read=1154
Also, please consider the following:
You can buy the complete Bellenger Headers and exhaust system for about $3400.00.
I was quoted a little over $5000.00 for the complete Archer/CDI system from Archer Racing.
When I was trying to decide which system to buy. Everyone that had a financial interest in the CDI headers claimed greater horsepower gains and used it to justify the higher price. The fact is (based on our tests)... that claim is just not true.
As a new Viper owner (bought my GTS in May 2001), I found it incredible frustrating trying to wade through all of the hype, biased opinions and advertising BS that was being spread throughout the Viper community... about how certain performance parts and mods actually perform. It seemed like no matter who I talked to, everyone had a different opinion, claim or idea.
For what it is worth... here is my advice to anyone considering upgrading or modifying their Viper:
1.) Search the archives of this forum and learn everything you can before spending any money.
2.) Have your car dyno'ed on a Dynojet and find out what your car's baseline RWHP numbers are before you make any modifications.
3.) Make sure that when you are quoted HP numbers... that you are being quoted RWHP as tested on a Dynojet.
4.) Demand a performance guarantee. For example, if you are quoted a 50 RWHP increase if you buy company XYZ's product. Inform them that you had a baseline dyno test done and demand they give you a refund if their product or service does not perform as promised.
5.) Re-dyno your car after every performance modification you make.
6.) Post your findings on this forum so you can help prevent new or future Viper owners from wasting money on performance mods and parts that do not deliver as promised.