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A good upgrade is high flow cats; big jump in sound and at least 15-20hp. You really can feel it.
As for headers, depends if you want them US made or no. Top quality ARH, SW, KOOKS then oversea made and quality too; TSP, stainless power, etc.
Go with 1 7/8 or 2". 2 " is what I have and the sound is crazy. I have high flow cats..with no cats it will smell but sound meaner.
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13' 1LE
Old setup: TSP 231-236/Tick 660/.105 PR, UDP, SW LT 2'' & HFC, stock NPP & H pipe, VR-DRX CAI, air scoop, Goertz1 manifold, 102mm BBK, 26" Toyo DRs, Forgestars R17x10 & F18x8, rear seat delete, remote Pat G tune Autocal, 7400 limiter, Spec Mini Twin. 91oct. 11.90@122.3, 0-60ft 2.0 / 11.99@123.6, 0-60ft 2.1 DA+819 ...519RWHP SAE
Solid roller SBE LS3, FED, LLSR, 91oct, 605rwhp N/A. Tuned by Pat G. Build by me.
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