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James Russels · 05-30-2017, 08:05 PM

Hi everyone,

I am looking to turbo my FRS at some point and was looking at the Speed By Design kits. I have been trying to find accounts of people who have tried both the 400x and 500x kits but have not had any luck. Can anyone who is familiar with either (preferably both) of these kits speak to them at all, or point me somewhere where this is documented?

Based on horsepower alone, the 500x appears to be worth the extra money. Is there a significant increase in turbo lag? Are there any other considerations I'm not thinking of?

05-30-2017, 08:05 PM	#1
James Russels Member Join Date: Sep 2015 Drives: 2013 FRS Location: Chicago, IL Posts: 59 Thanks: 5 Thanked 5 Times in 5 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	SBD Turbo - 400x vs 500x Hi everyone, I am looking to turbo my FRS at some point and was looking at the Speed By Design kits. I have been trying to find accounts of people who have tried both the 400x and 500x kits but have not had any luck. Can anyone who is familiar with either (preferably both) of these kits speak to them at all, or point me somewhere where this is documented? Based on horsepower alone, the 500x appears to be worth the extra money. Is there a significant increase in turbo lag? Are there any other considerations I'm not thinking of?