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I got the 2-1/2" x-pipe system from JCWhitney for $110, comes w/4 mandrel 45's about 28" long each. I could always use the 2-1/2" system on my 351W engine on one of my Ford vans. Getting the 2-1/4" x-pipe, I'll order new 2-1/4" in/out Dynomax stainless turbo mufflers. I'll use the other...

Well, I submitted my commitment to purchase headers to JBrady today. Maybe by this summer I can install them. In the meantime, I've ordered the second to last pieces of my new exhaust. After reading alot from JBrady's "exhaust advice columns", this is what I'm installing. 94 SC400 -...

Nice smooth bends, Peewee. The rush imports are long and have smooth mandrel bends. My car is a LHD, east coast USA. Do Tundra headers have the same bolt pattern as the '94 1UZ-FE 4.0L V8? What about the shorty headers that clublexus was developing? Any feedback from that project?

I've done a 2 qt. trans fluid change w/ T-IV fluid. How do I completely change out the 8.7 qts of fluid? I know the fluid has never been completely changed. I have 179,000 mi. I plan on purchasing & installing Lexus rebuilt 2800 rpm performance converter in the future. Should I just change...

I've been researching headers for my 1994 SC400 1UZ-FE. I've seen rushimports set. Nice, but are they the most efficient? They are piped #1 & #3 and #5 & #7 together. Isn't #1 & #5 and #3 & #7 a better configiration? What are my alternatives? I know I'm limited with space requirements and...

Thanks, Dr. X. I went ahead and bought one for X-mas. Going to use it soon. Got a spot on the Dulles Greenway in N. VA - flat, 2 lanes, 65 MPH limit, no traffic in the AM. Let you know how it works.

Short of having a dynomometer and a 1/8th mi. track in my backyard, what is the best tool for monitoring the performance upgrades on my SC400? I bought my car on Oct. 29, 2004. I've changed all the fluids and filters, complete tune-up, fuel and AC filter left. RMM sport intake installed. Still...

After reconnecting the battery, the ECU defaults back to factory settings. After warming the engine I shifted thru from low to park a couple times stopping on each gear a few seconds. I switch traction control off and ECT power on. I then take my Lexus out for 3 or 4 quick acceleration runs...

Finished the tune up tonight. Took her out to program the ECU. Now she catches second gear! Anytime I want that is. thanks.

I got all the NGK Platinum plugs in. Right side rotor, cap & wires installed. I clean as I go. Torqued the valve cover bolts. Rt. side rotor plastic around tip was cracked on old Denso. #7 & 8 plug wire broke off from inside old boot. Too old. The 4 thin seals around the rt. side plug...

Repair manual written in English covers maintenance procedures for the engine, chassis, body, electrical system, and more, clearly explained and illustrated. My 3 volume set inc. ship was $260 US, $50 more for electrical for the 1994 SC400. Call Lexus at 1-800-622-2033 and they will hook you up!

I returned the Bosch +4 plugs. Got NGK Platinums, Bosch Premium wires & fuel filter to be installed this Sunday. Last oil change, I used Gunk Oil Flush (5 min. @ idle), then new K & N filter, Valvoline Max life synthetic 5W-30 w/ 8 cyl. Engine Restore. 1994 SC400 w/ 179,000 mi. Before, the...

Going w/ NGK plugs instead of Bosch +4. Input from club members, parts guy, manufacturer - use Denso or NGK. Thanks.

Thanks Lex, will do. Drove my SC400 about 60 miles today. Noticeable improvement in performance with new fluids. Car was dealer serviced the first 140,000 miles. Read thru printout & can't find new wires installed. Next weekend work should yield more performance. Then on to the exhaust system.

I was reading thru "easy hp mods", very interesting octane discussion, learned alot. I read DO NOT USE Bosch Platinum plugs of any kind! Got me worried, I plan to install +4 Platinums, rotors & caps next week, also, upgrade my plug & dist. wires to handle the spark. Bad idea? It's been a year...

Been working on my new, 1 month old, 1994 SC400. Replaced trans fluid (T-IV), oil & filter (Valvoline max life syn. & K & N), diff. oil, installed RMM Sport intake. Next weekend - new plugs (Bosch platinum +4), OEM distributer caps & rotors). My question - 10 yr old plug wires look...