exhaust port diameter for GM Perf 376/480 LS3
05-01-2019, 07:51 PM
#1
On The Tree
Thread Starter
exhaust port diameter for GM Perf 376/480 LS3 Guys,
Looking for where I can find the exhaust port size for a GM Performance 376/480 LS3 with the stock heads that come on it...?
Does GM have a reference book or info sheet where I can find this info? Its not in the instruction sheet that came with the motor...
Thanks for any info.
Looking for where I can find the exhaust port size for a GM Performance 376/480 LS3 with the stock heads that come on it...?
Does GM have a reference book or info sheet where I can find this info? Its not in the instruction sheet that came with the motor...
Thanks for any info.
05-01-2019, 08:54 PM
#2
TECH Senior Member
It uses the same unmodified LS3 heads that come on an OEM LS3. Why do you need the port size?
