Putting on my zzp header & downpipe on tonight.
from what i hear you , you should go to the hardware store and buy better bolts first. I dont know personally but i always read threads on how they have weak bolts with their kits so im just trying to save you a hassle here man
the bolts for the block are fine.... but its the bolts from the header to the dp are the ones that break if you tighten them down too muh
Bingo!! I had one from them snap. When I first installed it I was so giddy to install I didn't notice how much smaller the bolts were than the holes. When I went to replace it, I noticed and we ended up using 1/2" grade 8 bolts, fits MUCH MUCH better, that is 2 full sizes up. I can't believe they didn't use that size with the set the send out.
Bingo!! I had one from them snap. When I first installed it I was so giddy to install I didn't notice how much smaller the bolts were than the holes. When I went to replace it, I noticed and we ended up using 1/2" grade 8 bolts, fits MUCH MUCH better, that is 2 full sizes up. I can't believe they didn't use that size with the set the send out.
It comes with instructions on what order to tighten them. You can get to most of them from the top of the engine, just reach down and behind the head. I had to use a wrench on the top ones because the primary tubes were too big and you can't get a socket on the nuts. But you don't have to get them super tight like people were saying.
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