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No matter the condition of your 2018 CTS, OPGI offers six Proportion Valve related parts to boost performance and get your 2018 CTS back on the road. Choose from trusted brands like CPP and Russell, with prices ranging from $14.99 to $108.99, all backed by our Price Match Guarantee. With OPGI’s 60-day return policy and thousands of verified reviews, you can shop confidently for your 2018 CTS restoration. Enjoy fast shipping directly to your home, or visit our Southern California Showroom & Warehouse to see our Proportion Valve related parts in person.
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