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      02-15-2012, 04:00 PM   #23
pbonsalb
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Apparently, Evolve now has a tune that preserves readiness monitors on catless cars.
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      02-15-2012, 05:52 PM   #24
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Some guys have gutted the secondary cat. Not much power to be gained but its free if you do it yourself or very cheap if a shop does it. Gutting the secondary cat has no effect on you passing smog, readiness, or leaving a bad smell (once the primaries are warmed up) as there is no sensor behind it unlike the primary cat.
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      02-15-2012, 06:10 PM   #25
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Quote:
Originally Posted by pbonsalb View Post
Apparently, Evolve now has a tune that preserves readiness monitors on catless cars.
Link?
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      02-15-2012, 06:21 PM   #26
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primary cat delete (aka test pipes) + akro cel delete or mild tune








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      02-15-2012, 06:28 PM   #27
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OP's talking about passing SMOG tests and everyone is recommending getting rid of his cats. What am I missing?
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      02-15-2012, 07:05 PM   #28
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Im not the most knowledgeable person on this subject but what about the MS stg 2 intake? or am i way off?
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      02-15-2012, 07:23 PM   #29
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Quote:
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primary cat delete (aka test pipes) + akro cel delete or mild tune


Do not do it like this guy with crappy crush bent piping. The BMW parts are specially designed and hydroformed to allow for enough clearance without significantly narrowing, crush bends are significant restrictions. Hydroformed bends like the stock pipes are NOT crush bends.
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      02-16-2012, 10:02 AM   #30
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Link?
I doubt this would be advertised as it is illegal.
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      02-16-2012, 01:07 PM   #31
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Do not do it like this guy with crappy crush bent piping. The BMW parts are specially designed and hydroformed to allow for enough clearance without significantly narrowing, crush bends are significant restrictions. Hydroformed bends like the stock pipes are NOT crush bends.
Once again Kit..tell us how you really feel I agree...TTPs are only $400.00.
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      02-16-2012, 03:46 PM   #32
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Quote:
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OP's talking about passing SMOG tests and everyone is recommending getting rid of his cats. What am I missing?
If you can take them off then you can put them on! PITA I know but its the price to pay for cheap power
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      11-07-2012, 10:38 AM   #33
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gintani x pipe + oe tune + 110 octane
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      11-07-2012, 11:25 AM   #34
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Turner Motorsport test pipes(400$) + Turner tune (1200$) = 40whp
Plus oem Ecu software update to latest version before tuner tune is done . And drop in air filter.
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      11-07-2012, 11:57 AM   #35
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gintani x pipe + oe tune + 110 octane
Fine for a glory dyno run, but expensive for daily driving. Meth injection will get you most of the same benefit, at a lower price over time.
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      11-07-2012, 01:39 PM   #36
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Quote:
Originally Posted by jdemetry View Post
OP's talking about passing SMOG tests and everyone is recommending getting rid of his cats. What am I missing?
U can replace the turnwr pipes with stock ones every coupe of years to pass smog test.
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      11-07-2012, 01:41 PM   #37
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Best way to get yourself closer to the 400hp club.
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      11-07-2012, 01:47 PM   #38
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Quote:
Originally Posted by jdemetry View Post
OP's talking about passing SMOG tests and everyone is recommending getting rid of his cats. What am I missing?
No kidding people.

Without going with a catless set up, best bang for buck is R&P (higher numerical gearing) and a tune. Only a modest power increase with the tune, but the gearing change will allow for quicker acceleration in every gear. Coupled together (gearing + tune), you will feel a significant "seat of your pants" improvement.
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      11-07-2012, 02:33 PM   #39
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Our pulleys are on sale for $350 right now.. Cant beat that bang for the buck.

Also our Green filter for $80 is a nice stocking stuffer.
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      11-07-2012, 02:47 PM   #40
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Quote:
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OP's talking about passing SMOG tests and everyone is recommending getting rid of his cats. What am I missing?
x2
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      11-07-2012, 03:20 PM   #41
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See my thread for how I went from ~350 whp to ~380 whp without even getting software yet!
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      11-07-2012, 03:21 PM   #42
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I think painted reflectors are the best value mod. What's wrong with 414 hp?
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      11-07-2012, 03:48 PM   #43
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What's wrong with 414 hp?
uh oh
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      11-07-2012, 04:52 PM   #44
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Quote:
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See my thread for how I went from ~350 whp to ~380 whp without even getting software yet!
Read that...very cool.
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