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Jeep 4 0l Engine With Airaid Intake

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We woke up the aged 4.0L engine in our ’99 Jeep Grand Cherokee with a variety of performance parts, including an Airaid intake kit and filter, a PowerAid throttle body spacer, new Champion spark plugs, and a Rugged Ridge exhaust system. The seat-of-the-pants improvement was very noticeable.

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