Anyone else has a 3.5 swap with oem 4th gen exhaust? I am using the 4th gen headers with wrapspeed y-pipe. stock cat and exhaust and wonder how much of a difference would a 2.5 catback make

 

alot dude i put my exhaust on and noticed it was soooo peppy go under ur car and look theres two parts its pinched stock over the axle in the back and near the bend its pushed up it will make a world of differnce i just got the ebay N1 exhaust it sounds good and great diffenece i mean the only thing that changes the sound is the muffler (and the motor) lmfao but yea dude get one there like 200 bucks on ebay or if u wanna go extravagant get a sp2

 

http://cgi.ebay.com/ebaymotors/95-99...Q5fAccessories

 

that muffle better sound like sonic gold coming out of that coffee can

 

i jus got a racing bullet muffler and that was a big difference. I bought it off EBay for 20 bucks! 2.5" inlet, 4" outlet. Sounds DOPE!!! Highly recommend. Jus make sure to get some exhaust hangers too.

http://cgi.ebay.com/ebaymotors/4-Fir...item3359bed110

 

Most restrictive part is the ypipe, which you replaced with a warpspeed unit. IIRC ajcool(i think thats his username) is running a stock catback on 3.5 swapped 4thgen.

 

I was told by SOMEBODY that Headers make a difference... I just hope that SOMEBODY adds his two cents...

[second comment removed]

 

Headers make a big difference if your 4th gen is a 99 because in that year the pre cats were placed in the headers

 

Where? I haven't noticed any... If so I'll buy 97-98 headers and screw the extra 02 sensor...

 

very restrictive

 

i think he talkin about cali spec. but the pre-cat is on the stock y-pipe.

Dont know about pre-cat on headers

 

Thats 99 ONLY 99-2001 had the pre cats placed in the exhaust manifolds (headers) instead of the y pipes I am 90% positive on that.

if thats the case...aftermarket headers would be a great addition to a 99-2001

but for the most part the exhaust manifolds w/o pre cats aren't very restrictive

 

not terribly restrictive, but not great either. 5-10whp.

 

i dont think the gains with a aftermarket header would be all that great. But the SS in the engine bay wd look cool.

 

I'll take a look tomorrow, won't be able to get under the car till this weekend though... But this is falling close to thread jacking.

 

My girls 3.5 swap has the stock exhaust on it. We took it to the track and trapped 97mph the first run. Then we unbolted the stock exhaust on the next run and trapped 101mph. It made a huge difference.

 

Cali 99's have a precat in the front header and one in the Y pipe for the rear bank. I have purchased a Fed front manifold and a warpspeed Y pipe. All the 4th gens have the same rear manifold.

 

Thank you! I was just going to say that, I didn't feel like borrowing jack stands and taking pictures.

Now onto the 3.5 thing... If you have a 3.0 not too restrictive but anything heavily modded will need something more... They're 5.5gens that make noticeable gains on the track when they run a straight 3" pipe bolted to a test pipe, it's been argued a million times over in the 5th gen section but the results can't be denied... VQ35s <3 3 inch exhaust. I forgot in my first post that you were using a VQ35 and not a VQ30, so disregard my earlier post.