Adding a cold air intake gives your engine more air and a bit more growl, but dropping $350 at once can be a sting. Spring is the best time to look for deals since everyone starts tinkering with their cars when the weather warms up.
You can use the Citi Simplicity® Credit Card to break that $350 cost into smaller chunks. The card offers 0% for 18 months on purchases and balance transfers from date of account opening, giving you an 18-month window to pay it off without interest.
Remember that the 0% intro window is a deadline, not a gift. If you don't pay off the full $350 before the 18 months are up, the bank will start charging interest on the remaining balance at their standard rate.