I need to replace my exhaust from the manifold all the way back. I have a stock engine. I need to run a cat because of smog check. I was wondering what is the most common/best pipe diameter with a stock engine. I want a free flowing muffler but probably not a glass pack, want it to be quiet also. Am thinking about running the tail pipe straight out the back. I will probably have a shop do this but I can kind of custom design it with the guy that owns the shop.
Thanks for any recommendations!



Andy Bridgeman Longmont, CO '87 Samurai (Shih Tzuki)stock drivetrain/Calmini 2" SR/235-15 Hi Tec MT's/rem. doors with quick disconnects/Robyn 23 Chan CB/

Andy, increasing the dia. to 2" is a common upgrade. I would advise NOT running the pipe straight out the back. The fumes are pretty strong with a straight out tail pipe.

Scott Whitmore
"It's not that it's able to do the job. It's that it does the job so well"

I just finished reading previous posts about fumes & retaining the stock bend in the rear. Amazing how such a small thing can make a big difference but I've experienced the same thing with other vehicles. Thanks for the reply.

Andy Bridgeman Longmont, CO '87 Samurai (Shih Tzuki)stock drivetrain/Calmini 2" SR/235-15 Hi Tec MT's/rem. doors with quick disconnects/Robyn 23 Chan CB/

Smog checks are not common down here in FL but the guys @ the muffler shops are pissy if you do any mods to your rig.. I am running a 12 dollar turbo II 2" in/out muffler made by the cherry bomb people. No cat or anything else, I am shooting the exhaust out of the drivers side about 7~10 inches in front of the rear tire and have a down spout on the end too. I also painted it black with some thermal paint, looks pretty spiff. The fumes are reeeal bad with no spout and straight back, a down spout helps, but shooting the exhaust out the side fixed everything! I was sick fer a while because of the fumes. *cough, *cough*, sniff, ehhhhhhhhhhhhhhhhhhhhhhhhh.... All better now..

got zook?
http://www.geocities.com/bik3r
29x10.5x15 SS TSL *SX*, Calmini Header, SPOA, Lights, Dupicolor, Z-bar, Xenon lights, diamond plate rockers, tubes front, rear, & sides!

hey nowhere I am running that same exhaust except for now I have a header! Man it is loud but I kind of like it cause it makes the engine sound like a bigger one!

" Go Cheap n' Smooth or Forget about it!"

Thanx
Studly
92 Zuki/235's/header/cherry bomb exhaust/Still Building
72 fj40/crate 350/33's/discs

Pretty much what everyone else said...

I have a Thorley header, cat and then 2.25" exhaust with a free-flow muffler. The pipe exits to the side behind the rear wheel. The exhaust guy reccomended 2.25 with the header and it seems to work well. It noticeably improved performance before the engine started to decline in its advanced age. The rebuilt engine does well with it too!

Only problem: It is LOUD! (Or perhaps throat-y) I might suggest a quieter muffler if you want to be friends with your noise-pollution-sensitive neighbors.

Acker