How much do headers add?

shrubby · 09-12-2016, 12:42 AM

Hi - hope someone might be able to help me with this. I'm going to have the Magnuson installed and already have the SW catbacks. Seems like it might also be a good time to add their headers too.

Of course this would void the 3/36k warranty I'm pretty sure and if not the tune would, but I might take the risk if the benefit outweighs having the warranty. What could I expect to gain by adding the headers?

LesBaer · 09-12-2016, 06:34 AM

If you can, return the SW cat back and just get a full header system with high flow cats. You can keep the NPP intact. Headers alone should give you about 20rwhp and added insurance against blowing your engine (assuming high-flow cats).

shrubby · 09-12-2016, 02:02 PM

Can't I just buy their headers with high flow cats and use them with the catbacks?

09-12-2016, 12:42 AM	#1
shrubby Drives: 16' Black³ / 18' ZL1 1LE Join Date: Apr 2016 Location: Tacoma, WA Posts: 213	How much do headers add? Hi - hope someone might be able to help me with this. I'm going to have the Magnuson installed and already have the SW catbacks. Seems like it might also be a good time to add their headers too. Of course this would void the 3/36k warranty I'm pretty sure and if not the tune would, but I might take the risk if the benefit outweighs having the warranty. What could I expect to gain by adding the headers? __________________ 16' Supercharged SS Black³ 18' ZL1 1LE Arctic Blue

09-12-2016, 06:34 AM	#2
LesBaer FMPG Drives: 2016 2SS Join Date: Dec 2015 Location: CT Posts: 1,888	If you can, return the SW cat back and just get a full header system with high flow cats. You can keep the NPP intact. Headers alone should give you about 20rwhp and added insurance against blowing your engine (assuming high-flow cats). __________________ Ordered 3/8/16- NFG/Ceramic White, M6, MRC, NPP, 6 pots, blk blade, no sunroof, blk splitter, blk bow ties, dark tails, nav. ARH 1 7/8" ceramic coated full sys w/NPP; Maggie 9.2psi (85mm); Jannetty rough idle cam(TSP), tune and LT4 fuel system; Forgeline VX1 Black PVD (20x10,11); R88R 315's; ALPriority; BMR rear arms, bushings, DS loop; RF intake (red); nGauge 93 octane: 712rwhp, 654rwtq / E85 (E66 mix): 734rwhp, 674rwtq (SuperFlow Dyno)

09-12-2016, 02:02 PM	#3
shrubby Drives: 16' Black³ / 18' ZL1 1LE Join Date: Apr 2016 Location: Tacoma, WA Posts: 213	Can't I just buy their headers with high flow cats and use them with the catbacks? __________________ 16' Supercharged SS Black³ 18' ZL1 1LE Arctic Blue

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