Try loosening everything, rotating/pushing the pipes up, and tighten front to back while its pushed up. Thats what I did and it gained a decent bit of clearance. Can also grab a hose clamp and wrap it around the brace in the back of the car, and the exhaust.
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2014 Solid Red Nismo 370z
Motordyne|Synergy Composites|Stance Suspension|Recaro|RJM|EVOR
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