AgreedRippied.Z06 said:Probably no more than 10 rwhp. The '02 filter box isn't bad. Most tuners will tell you the high flow duct and coupler are 0 hp items on a stock motor or even a head and cam car. Maybe some gain on a stroker. I'm still running the stock airbridge (duct) and I put on a red coupler for looks only. Put the duct and coupler $s towards another mod would be my opinion. :cheers: