# How to tell if obd0 or obd1 cams?
**URL:** https://forums.speedlife.net/t/how-to-tell-if-obd0-or-obd1-cams/190331
**Category:** PittSpeed Automotive
**Created:** [June 4, 2007, 6:09pm UTC](https://forums.speedlife.net/t/how-to-tell-if-obd0-or-obd1-cams/190331 "2007-06-04T18:09:58Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@stinkbox](https://forums.speedlife.net/u/stinkbox)
#### Post date: [June 4, 2007, 6:09pm UTC](https://forums.speedlife.net/t/how-to-tell-if-obd0-or-obd1-cams/190331/1 "2007-06-04T18:09:58Z")
is there a marking on them or a part number? this is for obd0 and obd1 ls stock cams. can i take a set of dial calipers and measure how round the lobes are on them and find specs. i have obd0’s in the car and i have another set sitting around that i think are obd1’s but im not sure.
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### Author:  [@ZEX350Z](https://forums.speedlife.net/u/ZEX350Z)
#### Post date: [June 4, 2007, 8:05pm UTC](https://forums.speedlife.net/t/how-to-tell-if-obd0-or-obd1-cams/190331/2 "2007-06-04T20:05:08Z")
part numbers on them possibly? could match them up w/ [hondaautomotiveparts.com](http://hondaautomotiveparts.com)
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### Author:  [@stinkbox](https://forums.speedlife.net/u/stinkbox)
#### Post date: [June 5, 2007, 1:26pm UTC](https://forums.speedlife.net/t/how-to-tell-if-obd0-or-obd1-cams/190331/3 "2007-06-05T13:26:26Z")
ah what the hell. i just looked them up @ [acuraoemparts.com](http://acuraoemparts.com) and they have the same part number from 90-95. obd2 get the pr4 substituted with p75. i read alot of places that when they went to obd1 with the b18b they had better cams, ecu and intake and trottle body and thats what gave em acouple more horsepower and higher redline. well the cams are the same part number. there also isn’t a part number on the cams anyways so no way to tell.