Side exit vs Rear exit

[evangallion]

Hey all!
I recently bought a 2g spyder for 500 (bad transmission), and currently fixing to run. On the process I am buying somethings for her, just got a transmission for a 4G63T (5 speed), and hope to put a 63 head with turbo using the 64 long block. So stay tuned for those questions to come from me soon, heh.

Currently I wanted to drop in some side exit exhausts, but I was wondering if there really is a Horsepower/ Torque advantage on it over the Rear exit exhausts, and it's pros and cons.

Also has any of you done this? If so tips and suggestions on brands would be great.

 

[94allwheeldsm]

Well depends on what emissions your state has and the application of the car. I would say that if this is going to be a track car then go for the side exhaust, but if this is going to be your DD or your weekend road warrior i would just go with 3" turbo back with a test pipe so when you go to get it inspected you could throw a cat in there. You could do that and get a dump tube so you could have both.

 

[evangallion]

I see. As far as emission test, they were banned in the state of Florida. Do you have any idea if there is a HP/ Torque gain difference from one or the other?

 

[dsmspick]

With a turbo car they are not affected by exhaust all to much. Ever seen a drag turbo car? The exhaust exits right out of the front bumper. So it all depends on what you plan to do with the car and how loud you want it to be.

 

[hazmat6135]

With a turbo car they are not affected by exhaust all to much. Ever seen a drag turbo car? The exhaust exits right out of the front bumper. So it all depends on what you plan to do with the car and how loud you want it to be.

with a turbo car exhaust is hugely important! the importance is on the size and flow because you want the least amount of backpressure. as for the side exit vs. rear it won't matter how its routed. the most important thing is to have a big enough pipe and tip to be free flowing. honestly if you not gonna make it an all out racecar then any cat-back would be good and easy. if you want something different or wanna save money buy the pipes and fab a side exit exhaust. GL and i look forward to seeing it if you do.

 

[JusMX141]

Currently I wanted to drop in some side exit exhausts, but I was wondering if there really is a Horsepower/ Torque advantage on it over the Rear exit exhausts, and it's pros and cons.

Also has any of you done this? If so tips and suggestions on brands would be great.

Nobody builds side-exit exhaust for our cars that you can purchase, so I'm not sure what you mean by that last line.

Side-exit exhaust is a drag-only mod that can subtract up to 50 pounds of unnecessary weight as well as maximizing flow. It's not intended for street-driven cars and will never pass any type of safety or emissions inspection.

 

[evangallion]

Thank you all for the insightful information. A 50 Lb reduction sounds quite beautiful; honestly didn't know it was that much.
Forgive the newbie question, but I recently got into DSM, my older car was a MKIII supra.
There are no emission test in the state of FL, as stated on an earlier post, but thanks for the heads up.

I guess I'll have to get a rear exit until I complete my side exit creation at the shop.

 

[FIBA M - EC17PSE]

Nobody builds side-exit exhaust for our cars that you can purchase, so I'm not sure what you mean by that last line.

Side-exit exhaust is a drag-only mod that can subtract up to 50 pounds of unnecessary weight as well as maximizing flow. It's not intended for street-driven cars and will never pass any type of safety or emissions inspection.

Many cars have side exhausts like the mustang for 1 and the m3 gtr road car they meet safty regulations and emissions for road cars! But if it dont pass then stick a 200 cell cat in.

As long as its constructed good and plenty of support then it will be fine for the road.

 

[JusMX141]

Thank you all for the insightful information. A 50 Lb reduction sounds quite beautiful; honestly didn't know it was that much.

This is only when using a side-exit exhaust at the bumper, eliminating the downpipe, catalytic converter, about 10 feet of steel piping, and a muffler.

Many cars have side exhausts like the mustang for 1 and the m3 gtr road car they meet safty regulations and emissions for road cars! But if it dont pass then stick a 200 cell cat in.

State inspection normally requires the exhaust to exit the body in the factory location. If it came from the factory with side pipes, they're perfectly legal.

 

[FIBA M - EC17PSE]

This is only when using a side-exit exhaust at the bumper, eliminating the downpipe, catalytic converter, about 10 feet of steel piping, and a muffler.


State inspection normally requires the exhaust to exit the body in the factory location. If it came from the factory with side pipes, they're perfectly legal.

But wouldnt it then come under a kit car status? As alot or them put them where ever they want and yet there still classed as legal! I do see your point and agree but if it was fully moulded to the extended side skirts and the rear bumper gap filled in i doubt it will cause any or no hasstle and pass every inspection, i will be following this as i also plan on building a side exit exhaust when i move to FL,

 

[95talongirl]

Another reason for side-exit would be for the pipes to clear the rear axle/subframe/suspension. Sometimes if you run a large enough pipe, then clearance becomes an issue on some cars. I don't think this is a problem with the DSM, AFAIK.

Also do not recall seeing a side-exit exhaust on a dsm before. I don't think there's any real advantage of it over the rear-exit... except for some weight savings. But depending on where you have the side exhaust come out from under the car, this may be minimal, as well.