I think I know the answer to this before I ask,but I'm going to ask anyways.I have the opportunity to buy a set of long tube headers,x pipe and cats that were on a '06 c6 base.Question is,I have a '13 Grand Sport with auto.Will they fit?

 

Yes, but with the lone exception of the slight, and easily fixable, angle difference of the X-pipe to the over-the-axle pipe.

 

As HOXXOH said,and this is local shop fix for me.

S.S. V band clamp sourced form local PEP BOYS auto parts and welded on with S.S. wire.
After getting right angle on pipe, clamp was welded on each end and band holds them together











https://www.pepboys.com/product/deta...632?quantity=1

 

Thanks folks for the info

 

If you have it in the budget order the tunnel insulator, shield for starter or wrap and wrap for the headers.

I bought a used grand sport with ARH long tubes, x pipe and high flow cats. Thinking about having the system removed in order to do the insulation and reinstall.

You might also notice more fuel smell when sitting at idle with window down. A local performance shop ran a scan to determine if another tune would help and told me if I wanted the smell to go away put the old OEM cats back on.

Hope this helpful.

PS: When the NPP opens up at RPM this thing really howls.

Jim

 

Well,I bought the headers and x pipe at a really good price.They were of the OBX verity.Turned round and sold them to a fellow that had a '07 base that they would fit without any mods and made a couple hundred $ to boot.Question.What is the preferred brand headers and x pipe everyone favors for my '13 GS?Hi flow cats,green cats or off road x pipe.I'm using I2030 Diablosport I2 tuner.Will it turn off the rear O2 sensors?Wanting to hear you folks opinion before I start looking for my answers.Thanks everyone,ya'll make for a great forum.

 

Depends on what your wanting to pay. If you keep an eye in the for sale section you may can come up on some great deals or get them for super cheap (off the new price). If yoru on a budget Look up Hinson headers with a catted H-PIPE they run $1050 shipped normally. If you call and ask some vendors you may can get ARH and KooKs which normally tucks really good and give you everything to install. You have to look around and do yourself and get the ones with cats. I got my ARH from Speedinc. from the time I ordered to shipped at my door it was about a month and they cost $1687 Shop around and you may can find cheaper.

 

I've set my budget at 2k.I guess everyone has figured out I'm a newbie in the Corvette scene.Question,are the performance and sound improvements worth the expense?I'm not a social butterfly so opinions from you folks go along way for me.I appreciate it.One other question.Will 19" on front and 20" rear work on my '13 GS okay?

 

I don't know about the wheel sizes but I know from the factory it's 18" on the front and 19" on the back on the GS. You may can tinker with that but I have no clue. You can use the search for the threads and find out what people are running. If you be patient you can find some used high quality headers (ARH, Kooks and Pfadt) in the for sale section. If not if you want new headers and don't need cats go with Texas Speeds headers 304 stainless. If you have to go through emissions and need cats go with Hinson Headers which they have a catted H-Pipe coated mild stainless if I'm not mistaking. You will need the 09-13 base C6 or GS headers and the headers will really wake the car up. Also you will want to get a tunnel insulator to install while your there Specialty Auto (Fred) sell good kits to help keep console temps down. Which you will need a tune to get the full benefits of the headers and also get the tuner to adjust the shift points on the automatic transmission and making it a lot better. From what I've read from most guys with autos without any mods just the shift point adjustments with the tune was worth it. So you can do this less than 2K if you find a good shop with reasonable prices.

1. Headers (NoN catted #1 Texas speed (TSP) ($800) #2 Hinson ($830). If need Cats version for emissions Hinson ($1050) TSP doesn't make a catted version for the car.
2. Tunnel heat shield insulator
3. Tune and adjust shift points in auto while tuning the vehicle

Do all of that at the same time and it should be less than 2K.

 

A budget of $2k should get you just about any header setup you want. I may or may not have a set available from my car in a couple weeks. I haven't decided if I'm gonna pull them off or not yet. Also a 19" front and 20" rear setup will work fine on your GS. I have a 2010 GS with those size cup wheels and kooks 2" headers

 

Got to ask.If the headers really wake up the car,why would you pull them off?

 

Well I can't really say how much the headers woke up the car because I did heads, cam and full exhaust all at once. The reason I Amy be pulling them off is because I'm thinking about trading in the GS to get into a Z06. I have a buddy who may be interested in buying my car though in which case the car will stay the way it is

 

Headers and a tune will give u 30 to 40 HP....depending on the day ... depending on the dyno . But the BUTT dyno will tell you that this gain is across the whole powerband which makes it feel like so much more . CAI and Headers were one of the best mods I did ......can't wait to do cam and converter

Dave

 

Yup ... That's about right

Here is what I got on my 2011 GS / A6 using the DynoJet (SAE Corrected):


Stock Engine:
Rated SAE Net . . . . . . . . . . . . . . . 436 HP / 428 TQ
Actual Rear Wheel (DynoJet) . . . . . 371 HP / 364 TQ . . . (15% Drivetrain Loss / A6)

As Modified Engine: . . . . . . . . . ..Pfadt Longtube Headers, Pfadt X-Pipe with Cats, Dyno Tune
Estimated SAE Net . . . . . . . . . . . . 475 HP / 470 TQ
Actual Rear Wheel (DynoJet) . . . . . 405 HP / 401 TQ . . . (15% Drivetrain Loss / A6)
_________________________________

As Modified Engine Increase: . . +34 RWHP / +37 RWTQ

.

 

BTW ... The A6 cars lose 15% HP though the drivetrain (Factory Rated Net HP -15% = RWHP)

The M6 cars lose 13% (Factory Rated Net HP -13% = RWHP)

 

I understand with the headers you need to turn off the rear O2 sensors.If this is true will a Diablosport I2 I2030 tuner be able to do that and in your opinion is it sufficient to do a satisfactory retune on the car to compensate for the headers and possibly a CAI?Thanks everyone for your input.

 

You don't need the rear 02 sensors. If they are not used, you will get a check engine light if they are not 'tuned off' via programing ... however, the car will run no different even with the check engine light on, so no problem.

If you don't want to look at the check engine light all the time, you need to get those rear sensors 'tuned off'.

Sorry, I don't know anything about the Diablosport tuner.

To get the HP benifits from the headers, you really need to have the car dyno-tuned after the header install ... then they can tune-off those rear 02 sensors.

 

if you get a custom tune from Diablo Lew he will turn them off for u

HE will also have you do a few logs , send them to him and he will adjust your tune for the headers . rinse and repeat as many times as you feel necessary to get the tune dialed in

if you are only doing a headers and CAI this is a good alternative to a dyno tune and very similar to a good street tune

I have done this and I am very happy with the results as I have downloaded the free log viewer and can see excatly what my car is doing as far as timing and fuel when I am running it down the track

Dave

 

Ended up going with PFADT headers,catted x pipe and Lingenfelter CAI.Found performance shop close by with chassis dyno to do the tuning.We'll see how it goes.

 

Cool great. Don't forget to get a before baseline and after mods dyno sheet. They may put it all on the same sheet. What type of dyno does the shop have also?