i have a 2.0l gsr, sleeved, forged pistons rods, running a greddy 18g, will itbe okay to use the greddy evo2 with the greddy downpipe? yes i understand threee inch will make more power but im talking reliability, will it be okay?

 

If you're asking if it will explode, no. you can use it. this isn't a mechanical part to concern yourself with "reliable". It'll work, just not the best.