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HC3-HDG4 kit features ACT's most popular Heavy Duty pressure plate
The headers with high-flow cats show a 28-33whp gain
They are NOT a direct fit to the stock catalytic converters
AA1-HDR4 kit features ACT's most popular Heavy Duty pressure plate
PPE MR2 Spyder Spun Race Cat PPE 2ZZ-GE swap header-2.25" outlet stock Muffler-304 SS 220002.250-SS PPE_CeramicCoating_2 HC3-HDG4 kit features ACT's mostOur 2ZZ GE swap high flow Metal Core cat will allow you to bolt up our 2ZZ swap race header to our 2. 5" muffler. If you already have a muffler you are re using choose the 2. 25" outlet. 304 stainless steel Features: Finish: T304 Stainless Steal Notes: For use with PPE Race Header. Spec: 2. 5" High Flow Cat Specifications: Finish: T304 Stainless Steal Notes: For use with PPE Race Header. Spec: 2. 5" High Flow Cat Fitment Spec: Vehicle Specific Part