Oh that's a decent gain if he had testpipes prior. I actually contacted ISR themselves, and they stated they tried to make the piping lengths as close as possible to equal, but they are not truly equal.
Regardless I ended up purchasing isr long tubes instead. The ISR shorty's weren't in stock for another 4 weeks, and I can assume ill get more gains going to the long tube route especially, since Im doing 3in intakes and and upper/lower ported plenum/ intake manifolds.
Sent from my Pixel 7 using Tapatalk
|