Thread: 355 sbc question about exhaust sound (need some help here!)

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Originally Posted by techinspector1

I suspect they're cheezy headers with 1/4" flanges that bow up from the heat of exhaust and allow leaks. Anyone buying headers should look for minimum 3/8" flanges and if somebody made headers with 1/2" flanges, I'd buy 'em.

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I will tell you my new best friend in preventing leaks and they are cheap...Nord lock washers, you can use them with your existing bolts and they are reusable. They sell them buy various other names through header manufacturers for a ton more money, but you can get them individually at Fastenal in stainless steel or steel. I put them on and have forgot about them, never had to tighten them again. I talked with a header rep that has some EXPENSIVE fancy products (expanding bolts w/a recessed set screw) and he said, come over here and behind therir booth he said, "Use the Nordlock and save some money" that was at a NSRA event. I also used them on the collectors and not a leak yet, I literally tried about every other option including saftey wiring and these work the best & the cheapest I have found (my opinion only)
https://www.fastenal.com/products/de...+Washer%2FPair
(thats the retail cost, you can get them cheaper if you have an account)
Google Nord lock to see how they work

Originally Posted by Matthyj

I will tell you my new best friend in preventing leaks and they are cheap...Nord lock washers, you can use them with your existing bolts and they are reusable. They sell them buy various other names through header manufacturers for a ton more money, but you can get them individually at Fastenal in stainless steel or steel. I put them on and have forgot about them, never had to tighten them again. I talked with a header rep that has some EXPENSIVE fancy products (expanding bolts w/a recessed set screw) and he said, come over here and behind therir booth he said, "Use the Nordlock and save some money" that was at a NSRA event. I also used them on the collectors and not a leak yet, I literally tried about every other option including saftey wiring and these work the best & the cheapest I have found (my opinion only)
https://www.fastenal.com/products/de...+Washer%2FPair
(thats the retail cost, you can get them cheaper if you have an account)
Google Nord lock to see how they work

k thanks for the info man. however im tempted to drop the money i have been saving on a twin turbo package for the motor. it comes with new headers and everything for the turbo units. just need to do all the plumbing! but im on the fence about it :/