Happy Holidays!
This has been covered many times on the ZR-1 discussion section of the Corvette Forum; I will go over it once again on this board. The original version of the "Alspaugh" header had an s-tube that was made universal for all the aftermarket exhaust systems for the ZR-1. It was made slightly longer than was needed because it's easier to cut pipe off vs. trying to weld additional pipe in. The bend on the original version was correct, you just had to cut some material off the s-tube to make it fit. Again, this was a precautionary measure. Most people didn't have any problems at all but very few did.
The s-tube has since been re-designed and it's as close to a true bolt on header as can be made. A person needs to understand that no header, especially one made in such small batches as the ones for the LT5, are going to be 100% bolt-on; it just isn't going to happen. That being said, these headers are of fantastic quality and are significantly cheaper than the 'Jeal' versions some have mentioned. Please email me at
usa_won@yahoo.com with any additional questions.