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I bought this exhaust spring for my CPI SM 50 and it has really lived up to expectations. It is made of durable material and has a perfect length of 55 mm, making it ideal for AM6 engines.
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Mega great, zero leaks , I would still recommend yourself on the end of the manifold that goes into the cylinder to give a little high temperature silicone so that the seal is 100%.
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The gasket is not the best fit for the power force 70 cylinder It is a little too small which makes the exhaust not pass through it
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Ideal for tuning 70ccm-90ccm. It fit my 2009 cpi sx 50 with 70cc kit. It picked up my power and now it's onehour fast.
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Very well made rear silencer and the sound is outstanding. Everything also went well with the delivery.
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Overall it's quality is good but you have to strain a lot to apply it and prepare yourself a liter of lemon balm
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