sierra xr4x4
20-05-2005, 06:51 PM
#1
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sierra xr4x4
my brother has just gotten a mongoose system for his sierra its the 2.9 model. he said that there are sensors screwed into the original down pipes but there arent any holes in the mongoose down pipes is that normal or will he have to get s/s nuts welded into the new down pipes
thanks any help would be great
Mark
thanks any help would be great
Mark
20-05-2005, 06:54 PM
#2
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If his car was originally a cat equipped one then he will have to get the bosses welded in.
I assume it's a '91 model?
My '89 an '90 ones don't have the bosses.
I assume it's a '91 model?
My '89 an '90 ones don't have the bosses.
20-05-2005, 07:10 PM
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Llamda sensor or whatever it's called, think so anyway??? Anyway unless your car is 93 on you don't need a cat... I think it's 93 anyway 
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